The Samsung Galaxy Z Fold8 Ultra and Xiaomi 18 Fold take different approaches to foldable size: Samsung has the larger stated inner display, while Xiaomi’s is wider in proportion and its phone has a larger stated battery and a dedicated 3.5× periscope telephoto camera. A straightforward price difference cannot be calculated from the available launch prices: Samsung’s figures are Japanese yen and Xiaomi’s are Chinese yuan, from different markets and dates.
This is a comparison of the launched devices as of October 9, 2026. Samsung styles its product name “Galaxy Z Fold8 Ultra” (without a space between “Fold” and “8”); Xiaomi’s name is “Xiaomi 18 Fold.” Specifications below are manufacturer specifications or launch-report figures, not independently tested performance.
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How do the displays and form factors compare?
| Specification | Samsung Galaxy Z Fold8 Ultra | Xiaomi 18 Fold |
|---|---|---|
| Cover display | 6.5 inches (Samsung US) | 5.38 inches (Xiaomi Community and launch coverage) |
| Main display | 8.0 inches (Samsung launch release) | 7.58 inches (Xiaomi Community and launch coverage) |
| Main-screen aspect ratio | Not stated for the Ultra. Samsung’s 4:3 figure refers to the separate Galaxy Z Fold8, so it should not be applied to the Ultra. | 2:1 (Xiaomi Community) |
| Inner-display resolution and refresh rate | Not stated in the cited materials | 2364 × 1672; 120 Hz (Cinco Días launch coverage) |
On the stated diagonal measurements, Samsung’s screens are larger. Xiaomi’s 2:1 inner-screen ratio describes a shorter, wider shape than a tall phone display; that may suit side-by-side content, but screen size and ratio alone do not establish which interface or multitasking experience is better. Samsung’s 4:3 claim belongs to another model, not this Ultra.
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1Scan for outdated or missing drivers - takes under a minute2Repair Windows errors before they cause bigger problems3Fix the driver behind crashes, sound loss and screen glitchesXiaomi Community says both screens can reach a peak brightness of 4,000 nits under a 30% APL condition. That is a conditional peak specification, not a claim of sustained brightness in everyday use. No equivalent brightness figure for the Samsung Ultra is established here.
#1 Best Overall
- SPLIT THE VIEW. MULTITASK¹ TO THE MAX: Productivity never felt this powerful. Use up to three apps¹ at once on the expansive inner screen of Galaxy Z Fold8 Ultra. You’ll enjoy plenty of space to work, play, connect and more.
- MULTITASKING MADE SMARTER WITH AI: Stay one step ahead with AI² that suggests which apps you might need next. Then view those multiple windows side by side on the large screen of your Galaxy Z Fold8 Ultra.
- ANY SHOT, ALL THE DETAILS: Dive into the details of any image with our best camera on a foldable smartphone. Galaxy Z Fold8 Ultra boasts a 200MP camera — and an upgraded 50MP Ultra Wide lens — for both stunning wide shots and extreme close-ups.
- ELITE CHIPSET. FLUID GRAPHICS: Experience what’s possible with our most advanced Galaxy Z Series processor. From immersive gaming and speedy multitasking to the latest Galaxy AI³ features, the Snapdragon 8 Elite Gen 5 keeps everything running seamlessly.
- THE BATTERY YOU’VE BEEN WAITING FOR: It’s the battery you’ve been wanting in a foldable cell phone. Galaxy Z Fold8 Ultra packs a powerful ultra-sized⁴ battery in an ultra-slim design. Plus, with Super Fast Charging 2.0⁵, charge up faster than ever before.
What are the cameras, battery and charging specifications?
| Specification | Samsung Galaxy Z Fold8 Ultra | Xiaomi 18 Fold |
|---|---|---|
| Main camera | 200 MP, with HDR support at 200 MP (Samsung launch release) | 200 MP, Leica-branded (Xiaomi launch coverage) |
| Ultra-wide camera | 50 MP | 50 MP, Leica-branded |
| Telephoto camera | A telephoto specification is not established in the cited materials. | 50 MP Leica-branded periscope telephoto, with 3.5× optical magnification reported in launch coverage |
| Battery capacity | 5,000 mAh typical; Samsung lists 4,854 mAh rated capacity | 6,000 mAh |
| Wired charging | 45 W fast charging (Samsung launch release) | 67 W (launch coverage) |
| Wireless charging | Samsung US mentions compatible wireless chargers, but the cited materials do not establish a charging wattage. | 50 W (launch coverage) |
The camera specifications suggest different hardware emphasis: Xiaomi’s reported rear setup includes a dedicated periscope telephoto, while Samsung’s cited launch specifications identify the main and ultra-wide cameras. Megapixels and lens descriptions do not establish comparative image quality, low-light performance, or zoom results; no independent camera test is available here.
The battery capacities and charging wattages are specifications, not measured battery life or charging times. Real-world endurance and charging can depend on usage and conditions, and no independent comparative test establishes which phone lasts longer or charges faster in practice.
How do weight, durability and other hardware details differ?
Samsung lists the Fold8 Ultra at 215 g and 4.1 mm thick when unfolded. The cited Xiaomi launch materials do not give a comparable weight or unfolded thickness, and neither phone’s folded dimensions are established here. That means the available figures do not support a complete portability comparison.
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Rank #2
- CREATED FOR YOUR CONTENT: Any way you turn it, the new Galaxy Z Fold8 gives you a fuller viewing experience. Designed with your content in mind, this foldable phone is the perfect size to make your movies, books and more incredibly immersive.
- WORLD’S LIGHTEST FOLD¹: Galaxy Z Fold8 is the newest foldable phone for content on the go. Unfolded, it fits movies and books for an immersive experience. Folded, it delivers comfortable texting and everyday use — all on the world’s lightest fold.¹
- THE BRIGHTEST DISPLAY ON A GALAXY PHONE: Our brightest smartphone display² provides you with a comfortable view, whether you’re inside or outside. Watch movies, play games and scroll with ease no matter where you are.
- RECORD. REFRAME. READY FOR SOCIAL³: Record content on Galaxy Z Fold8 and then use My FanCam³ to keep your subject center stage. The result is a social-ready video that focuses on the part of the action you really want.
- UNTETHER YOUR ENTERTAINMENT: The long-lasting battery of Galaxy Z Fold8 is built to power hours of entertainment. And when you do need to recharge, Super Fast Charging 2.0⁴ gets you back to what you love quickly.
Samsung US specifies Snapdragon 8 Elite Gen 5 for Galaxy, an IP48 rating, and no S Pen support. It also describes an Armor Aluminum frame, Corning Gorilla Glass Ceramic 3 on the front, Gorilla Glass Victus 2 on the back, and titanium layers beneath the display. These are Samsung’s product descriptions, not independent drop, water-resistance, or durability test results.
Xiaomi launch coverage identifies the XRING O3 processor. A directly comparable independent performance test is not established, so processor names alone do not show which device is faster. The cited Xiaomi materials do not establish a comparable water-resistance rating or stylus-support specification.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What are the Samsung and Xiaomi launch prices?
The prices below refer to different currencies, markets, and dates. The Japanese amounts are yen (JPY); the China amounts are yuan (CNY). They are launch or retail snapshots, not same-market prices for matching configurations.
| Phone and market | Configuration | Price and date |
|---|---|---|
| Samsung Galaxy Z Fold8 Ultra, Japan | 256 GB | ¥296,780 (JPY), Samsung Japan online shop, July 22, 2026 |
| Samsung Galaxy Z Fold8 Ultra, Japan | 512 GB | ¥326,780 (JPY), Samsung Japan online shop, July 22, 2026 |
| Samsung Galaxy Z Fold8 Ultra, Japan | 1 TB | ¥386,780 (JPY), Samsung Japan online shop, July 22, 2026 |
| Xiaomi 18 Fold, China | 12 GB RAM / 256 GB | ¥10,999 (CNY), reported at the September 7, 2026 launch |
| Xiaomi 18 Fold, China | 12 GB RAM / 512 GB | ¥11,999 (CNY), reported at the September 7, 2026 launch |
| Xiaomi 18 Fold, China | 16 GB RAM / 512 GB | ¥12,999 (CNY), reported at the September 7, 2026 launch |
| Xiaomi 18 Fold, China | 16 GB RAM / 1 TB | ¥14,999 (CNY), reported at the September 7, 2026 launch |
| Xiaomi 18 Fold, China | Limited ceramic edition, 16 GB RAM / 1 TB | ¥15,999 (CNY), reported at the September 7, 2026 launch |
Samsung says other retailers may set different prices. The Xiaomi figures are China launch prices reported by IT Home and Cinco Días; they do not establish a price in another country. Although both currencies use the ¥ symbol, Japanese yen and Chinese yuan are not interchangeable. Subtracting the listed amounts—or converting them and presenting the result as a global price gap—would not be a like-for-like comparison. For a useful local comparison, check current prices in the same market for equivalent storage, with taxes and the purchase date accounted for.
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Samsung announced sales beginning August 7, 2026, with rollout across 106 markets. Samsung notes that colors, models, connectivity and availability can vary by market. Its Japanese prices above are specific to Samsung Japan’s July 22 announcement.
Xiaomi’s launch reporting places the Xiaomi 18 Fold’s China launch on September 7, 2026, with first sales scheduled for September 10. The cited materials do not establish global Xiaomi retail availability, local warranty coverage, supported network bands outside China, or after-sales service in other markets. Buyers considering a China-market device outside China should confirm the exact model’s bands, software, warranty, returns policy and local support with the seller before purchasing.
Quick Recap
Which one should you choose?
- Consider the Samsung if the 6.5-inch cover screen, 8.0-inch main screen, 215 g listed weight, Samsung’s stated hardware details, or its availability in your market are priorities. Check local pricing and the exact regional model.
- Consider the Xiaomi if its shorter, wider 2:1 inner-screen format, reported 3.5× periscope telephoto, larger stated battery, or listed charging specifications fit your needs—and you can verify local compatibility and support.
- Wait for same-market evidence if your decision depends on actual battery life, camera quality, sustained performance, durability, or value at a local price. The cited specifications and region-specific prices cannot settle those comparisons.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
