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One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchThe realme P3x 5G and vivo X300 FE sit in very different price and feature tiers in India. The P3x is the larger-screen, lower-cost option; the X300 FE is a compact premium phone with a faster listed chipset, a telephoto camera, faster charging and a longer advertised update policy. The price snapshots available for the two models come from different retailers and dates, so they do not establish a stable current price difference.
realme P3x vs vivo X300 FE specs comparison
The specifications below come from the manufacturers’ product pages unless otherwise noted. They are published claims, not results from hands-on testing.
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| Specification | realme P3x 5G | vivo X300 FE |
|---|---|---|
| Processor | MediaTek Dimensity 6400; 6nm, octa-core, up to 2.5GHz. realme specifications | Snapdragon 8 Gen 5; 3nm, octa-core, listed by vivo up to 3.80GHz. vivo India store specifications |
| Display | 6.72-inch LCD, 2400 × 1080 resolution, up to 120Hz, stated peak brightness of 950 nits. realme specifications | 6.31-inch AMOLED, 2640 × 1216 resolution, 120Hz, stated local peak brightness of 5000 nits. vivo India store specifications |
| RAM and storage | 6GB or 8GB RAM with 128GB storage. realme specifications | 8GB or 12GB RAM; 256GB or 512GB storage. vivo India store specifications |
| Rear cameras | 50MP main camera; 91mobiles also lists a 2MP depth camera. realme specifications · 91mobiles comparison | 50MP main with OIS, 50MP telephoto with OIS, and 8MP wide-angle. vivo India store specifications |
| Front camera | 8MP, according to 91mobiles. 91mobiles comparison | 50MP autofocus. vivo India store specifications |
| Battery and charging | 6000mAh typical capacity, 45W charging; realme says a 45W adapter is included in the box. realme specifications | 6500mAh typical capacity, 90W wired charging and 40W wireless charging, as advertised by vivo. vivo India store specifications |
| Size and weight | 6.72-inch display; weight not stated in the cited specification extract. realme specifications | 6.31-inch display, 191g, 7.99mm thick. vivo India store specifications |
| Durability and software support | realme’s official specification page identifies the model as P3x 5G. 91mobiles lists Android 15 and two years of OS updates plus three years of security updates; confirm that policy with realme before relying on it. realme specifications · 91mobiles comparison | IP68/IP69 rating; vivo advertises five years of OS upgrades and seven years of security updates. These are manufacturer claims. vivo product page |
India price difference: what the available listings show
There is no reliable like-for-like current price difference in these snapshots: the prices are from different outlets and may reflect different dates, offers or configurations. Check the live listing, seller and exact variant before buying rather than subtracting the figures below as if they were simultaneous market prices.
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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 glitches| Phone and source | Recorded price | Qualification |
|---|---|---|
| realme P3x 5G, 91mobiles listing | ₹12,999 | Listed at Flipkart; this is a third-party retailer snapshot, not a confirmed current price from realme. 91mobiles comparison |
| vivo X300 FE, vivo India E-Store | ₹94,999 | Store display for the selected 12GB/256GB configuration, against an MRP of ₹119,999. Snapshot accessed 2026-10-07. vivo India store |
| vivo X300 FE, 91mobiles listing | ₹89,999 | Listed at Amazon; a separate retailer snapshot from the vivo store figure. 91mobiles comparison |
| vivo X300 FE, Android Central review | ₹79,999 | Reported as the India launch price in the review, not a current offer. Android Central review |
The P3x’s official realme page provides specifications but does not establish its current selling price. For either model, compare the exact RAM and storage variant, seller, delivery availability and any offer conditions on the day you purchase.
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What the spec differences mean in practice
Screen size and handling
The P3x has a 6.72-inch LCD, making it the larger-display choice on paper. The X300 FE’s 6.31-inch AMOLED display makes it the more compact option. The listed peak-brightness figures use different manufacturer descriptions—realme states peak brightness, while vivo specifies local peak brightness—so they should not be treated as a direct brightness test.
Processing and memory
The listed chipsets place the X300 FE in a higher hardware tier: vivo specifies a 3nm Snapdragon 8 Gen 5, while realme lists a 6nm Dimensity 6400. These are manufacturer specifications, not a measured comparison of speed, gaming performance or battery efficiency. The X300 FE also offers listed configurations with more RAM and storage; check the precise variant because capacity affects price.
Camera flexibility
The P3x has a 50MP main camera, with 91mobiles listing an additional 2MP depth camera. The X300 FE adds a stabilized 50MP telephoto camera and an 8MP wide-angle camera to its stabilized 50MP main camera. Its listed 50MP autofocus front camera also has a higher stated resolution than the P3x’s 8MP front camera. Megapixel counts and module lists do not by themselves establish real-world image quality.
Battery and charging
Both phones have substantial stated battery capacities: 6000mAh typical for the P3x and 6500mAh typical for the X300 FE. vivo lists higher charging rates and wireless charging for the X300 FE. Those figures describe supported charging specifications, not a guaranteed charging time or battery life; actual results depend on use and charging conditions.
Rank #2
- For USA Buyers: This Smartphone is not compatible/will not work with any CDMA Networks including: VERIZON, SPRINT, US CELLULAR. Please check with your network provider for 3G or 4G/LTE compatibility check before you purchase.
- Dual-SIM, Network Compatibility, SIM CARD 1 [2G : GSM 850 / 900 / 1800 / 1900 and/or 3G : WCDMA 850(B5) / 900(B8) / 2100(B1) and/or 4G : FDD-LTE 700(B28) / 800(B20) / 850(B5) / 900(B8) / 1700|2100(B4) / 1800(B3) / 1900(B2) / 2100(B1) / 2600(B7): TDD-LTE 2300(B40) / 2500(B41) / 2600(B38)] SIM CARD 2 [2G: GSM 850 / 900 / 1800 / 1900]
- 6.6 inches, IPS LCD, 1080 x 2400 pixels, Corning Gorilla Glass 5
- 256GB Storage, 12GB RAM
- Android 10, Realme UI, Qualcomm SM8150 Snapdragon 855+ (7 nm), Octa-core (1x2.96 GHz Kryo 485 & 3x2.42 GHz Kryo 485 & 4x1.78 GHz Kryo 485)
Updates and durability
vivo advertises IP68/IP69 protection and a five-year OS upgrade and seven-year security update policy for the X300 FE. For the P3x, the two-year OS and three-year security figures come from 91mobiles rather than the cited realme specification page, so verify them with realme before treating them as definitive.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Which phone should you buy?
Choose the realme P3x if
- You want a larger 6.72-inch screen.
- Your budget is the main constraint and you find a suitable live offer.
- You need the listed everyday essentials and do not require a dedicated telephoto camera.
- You value the included case and 45W adapter listed by realme; confirm the contents for the exact market and package.
Choose the vivo X300 FE if
- You prefer a smaller 6.31-inch phone and a premium-tier listed chipset.
- You want the added flexibility of a telephoto camera, higher-resolution listed front camera and wireless charging.
- The advertised IP68/IP69 protection and longer stated update policy matter to you.
- Your budget accommodates the premium-tier price snapshots, after checking the live price for your chosen configuration.
Neither is a universal winner: the P3x prioritizes screen size and a lower-cost tier, while the X300 FE offers a more extensive feature set at a substantially higher listed price. The specifications do not substitute for hands-on evidence about camera output, sustained performance or real battery life.
Optional telephoto accessory for vivo X300 FE
vivo says its ZEISS Telephoto Extender Gen 2 is compatible with the X300 FE and is sold separately. The company describes it as a 200mm-equivalent accessory weighing 153g. Compatibility and availability do not mean it is included with the phone; check the product page and current listing before purchase. vivo X300 FE product page
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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.
