Using the cited UK price references for 256GB models, the Galaxy S25 Ultra was £1,249 at Samsung’s UK launch RRP, while the Xiaomi 17T was reported at £649 in a June 2026 review: a £600 difference. These are dated reference prices, not a live comparison of today’s offers; retailer prices and availability can change.
Samsung Galaxy S25 Ultra vs Xiaomi 17T: key specs
| Specification | Samsung Galaxy S25 Ultra | Xiaomi 17T |
|---|---|---|
| Display | 6.9-inch QHD+ Dynamic AMOLED 2X, 120Hz. Samsung also describes the usable measurement as 6.8 inches when accounting for rounded corners. | 6.59-inch 1.5K AMOLED, up to 120Hz. |
| Processor | Snapdragon 8 Elite for Galaxy. | MediaTek Dimensity 8500-Ultra. |
| RAM and storage | 12GB RAM; 256GB, 512GB or 1TB storage. | 12GB RAM; 256GB or 512GB storage. |
| Rear cameras | 200MP main with OIS; 50MP ultrawide; 50MP 5x optical telephoto with OIS; 10MP 3x optical telephoto with OIS. | Official specifications surfaced here list a 50MP main camera with OIS and a 12MP ultrawide. Xiaomi promotes a Leica 5x periscope telephoto; specific telephoto sensor details are not stated in the cited specification excerpt. |
| Battery and charging | 5,000mAh typical capacity. | 6,500mAh typical capacity; 67W wired HyperCharge. |
| Dimensions and weight | 162.8 × 77.6 × 8.2mm; 218g. | 157.6 × 75.2 × 8.17mm; 200g. |
| UK price references | 256GB: £1,249; 512GB: £1,349; 1TB: £1,549 at Samsung’s UK launch RRP. | 256GB: £649; 512GB: £699, as reported by TechRadar in its June 2026 review. |
Sources: Samsung UK specifications and launch RRPs; Xiaomi Global specifications; Xiaomi 17T product page; TechRadar review and reported UK prices.
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How big is the UK price difference?
Comparing the 256GB versions, the cited figures are £1,249 for the Galaxy S25 Ultra and £649 for the Xiaomi 17T, a £600 gap. Samsung’s figure is its original UK RRP; TechRadar reported the Xiaomi price in a June 2026 review. The references are from different dates and do not establish a current checkout-price difference. Discounts, stock and retailer pricing may change, so check local listings before buying.
At the next listed storage tier, Samsung’s 512GB UK launch RRP was £1,349 and TechRadar reported £699 for the 512GB Xiaomi 17T. Samsung also listed a 1TB S25 Ultra for £1,549; Xiaomi’s cited specification page lists storage up to 512GB.
#1 Best Overall
- Stunning 6.9″ Dynamic AMOLED 2X QHD+ display with adaptive 1–120 Hz refresh rate, ultra‑bright up to ~2600 nits, HDR support, “Vision Booster,” and adaptive color tone — giving vivid colours, great outdoor visibility, and super‑smooth scrolling.
- Powerful internals: it runs on the new Snapdragon 8 Elite for Galaxy (3 nm) chip, with 12 GB (or in some markets up to 16 GB) RAM and up to 1 TB UFS 4.0 storage — offering significantly improved CPU/GPU/NPU performance, especially for AI tasks, gaming, and heavy multitasking.
- Advanced quad‑camera system: 200 MP wide main sensor, plus a 50 MP ultrawide, a 50 MP periscope telephoto (5× optical zoom), and a 10 MP telephoto (3× optical zoom) — giving flexibility from ultra‑wide through detailed telephoto shots, and strong performance in varied lighting.
- 5,000 mAh battery with 45 W fast wired charging, wireless charging (Qi2) and reverse wireless charging — balancing long battery life with flexible charging options.
- Durable, premium build: Titanium‑frame body, protected by Corning Gorilla Armor 2 glass, with IP68 dust/water resistance, ultrasonic in‑display fingerprint sensor, modern connectivity (5G, Wi‑Fi 7, Bluetooth, UWB, USB‑C), and long‑term software support (Android 15 / One UI 7, promised 7 major OS/security updates).
Where the specifications differ
Screen size and resolution
The S25 Ultra has the larger listed screen and higher resolution: Samsung specifies a 6.9-inch QHD+ panel, while Xiaomi lists a 6.59-inch 1.5K panel. Both are specified at up to 120Hz. Manufacturer measurements can account for rounded corners differently, and brightness figures should not be treated as directly comparable test results unless the measurement methods and conditions match.
Processor and memory
The phones use different processor platforms: Snapdragon 8 Elite for Galaxy in Samsung’s model and MediaTek Dimensity 8500-Ultra in Xiaomi’s. Both cited configurations have 12GB of RAM. Component names alone do not establish which phone will feel faster or sustain performance better in a particular workload.
Rank #2
- Stunning 6.9″ Dynamic AMOLED 2X QHD+ display with adaptive 1–120 Hz refresh rate, ultra‑bright up to ~2600 nits, HDR support, “Vision Booster,” and adaptive color tone — giving vivid colours, great outdoor visibility, and super‑smooth scrolling.
- Powerful internals: it runs on the new Snapdragon 8 Elite for Galaxy (3 nm) chip, with 12 GB (or in some markets up to 16 GB) RAM and up to 1 TB UFS 4.0 storage — offering significantly improved CPU/GPU/NPU performance, especially for AI tasks, gaming, and heavy multitasking.
- Advanced quad‑camera system: 200 MP wide main sensor, plus a 50 MP ultrawide, a 50 MP periscope telephoto (5× optical zoom), and a 10 MP telephoto (3× optical zoom) — giving flexibility from ultra‑wide through detailed telephoto shots, and strong performance in varied lighting.
- 5,000 mAh battery with 45 W fast wired charging, wireless charging (Qi2) and reverse wireless charging — balancing long battery life with flexible charging options.
- Durable, premium build: Titanium‑frame body, protected by Corning Gorilla Armor 2 glass, with IP68 dust/water resistance, ultrasonic in‑display fingerprint sensor, modern connectivity (5G, Wi‑Fi 7, Bluetooth, UWB, USB‑C), and long‑term software support (Android 15 / One UI 7, promised 7 major OS/security updates).
Camera systems and zoom
Samsung lists four rear cameras, including separate 3x and 5x optical telephoto cameras. Xiaomi promotes a Leica 5x periscope telephoto, but the cited official specification excerpt does not expose all of that camera’s sensor details. Those hardware descriptions show different camera coverage; they do not establish which phone takes better photos without comparable testing.
Do these 3 things before closing this tab:
1Repair Windows errors before they cause bigger problems2Scan for outdated or missing drivers - takes under a minute3Clear out junk files and repair common Windows errorsBattery capacity and charging
Xiaomi lists a 6,500mAh typical battery and 67W wired charging, compared with Samsung’s 5,000mAh typical battery. These are manufacturer specifications, not a measured battery-life comparison or guaranteed charging time; actual results depend on use and conditions.
Rank #3
- Stunning 6.9″ Dynamic AMOLED 2X QHD+ display with adaptive 1–120 Hz refresh rate, ultra‑bright up to ~2600 nits, HDR support, “Vision Booster,” and adaptive color tone — giving vivid colours, great outdoor visibility, and super‑smooth scrolling.
- Powerful internals: it runs on the new Snapdragon 8 Elite for Galaxy (3 nm) chip, with 12 GB (or in some markets up to 16 GB) RAM and up to 1 TB UFS 4.0 storage — offering significantly improved CPU/GPU/NPU performance, especially for AI tasks, gaming, and heavy multitasking.
- Advanced quad‑camera system: 200 MP wide main sensor, plus a 50 MP ultrawide, a 50 MP periscope telephoto (5× optical zoom), and a 10 MP telephoto (3× optical zoom) — giving flexibility from ultra‑wide through detailed telephoto shots, and strong performance in varied lighting.
- 5,000 mAh battery with 45 W fast wired charging, wireless charging (Qi2) and reverse wireless charging — balancing long battery life with flexible charging options.
- Durable, premium build: Titanium‑frame body, protected by Corning Gorilla Armor 2 glass, with IP68 dust/water resistance, ultrasonic in‑display fingerprint sensor, modern connectivity (5G, Wi‑Fi 7, Bluetooth, UWB, USB‑C), and long‑term software support (Android 15 / One UI 7, promised 7 major OS/security updates).
Size and handling
The Xiaomi 17T is shorter, narrower and lighter on the listed figures: 157.6 × 75.2mm and 200g, versus 162.8 × 77.6mm and 218g for the S25 Ultra. Their listed thicknesses are close, at 8.17mm and 8.2mm respectively.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Which phone makes more sense?
Choose by priorities, not a spec-sheet winner
- Consider the Xiaomi 17T if the lower cited UK price, lighter and smaller body, larger stated battery capacity, or 67W charging specification matters most to you.
- Consider the Galaxy S25 Ultra if you want the larger, higher-resolution listed display, two specified optical telephoto focal lengths, or a 1TB storage option.
These are differences in listed hardware and dated UK price references, not an overall performance or camera verdict. The cited sources do not provide a controlled head-to-head comparison of camera quality, speed or battery life.
What to check before buying
- Compare the same storage size and current price in your country; the figures above are UK references, not universal prices.
- Check the local model’s network bands and warranty. Xiaomi notes that network-band support varies by region.
- Check what is included in the box: Samsung UK says a travel adapter is not included, and Xiaomi Global says a power adapter is not included.
- Remember that Xiaomi says usable RAM and storage are lower than the total listed because system software occupies some space.
Samsung announced general availability for the S25 series from 7 February 2025. Its cited UK prices are launch RRPs rather than guaranteed present-day offers. Samsung’s worldwide availability announcement gives the launch timing. For a current Samsung UK listing, see the Galaxy S25 Ultra buy page; availability and pricing can change.
Quick Recap
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.
