Home Phone comparison Xiaomi Redmi 15 4G and Vivo X300 Ultra - Which is better?

Xiaomi Redmi 15 4G vs Vivo X300 Ultra

60 out 100
Xiaomi Redmi 15 4G
VS
94 out 100
Vivo X300 Ultra
Xiaomi Redmi 15 4G
Vivo X300 Ultra

Compared 2 smartphones : Xiaomi Redmi 15 4G Manufactured in August, 2025, with display 6.9 with chipsetQualcomm Snapdragon 685, vs Vivo X300 Ultra, Manufactured in April, 2026with chipsetQualcomm Snapdragon 8 Elite Gen 5. Below are specs, tests, pros and cons for each device

  1. Differences
  2. Review
  3. Specs
  4. Benchmarks
  5. Battery Life
  6. Cameras
  7. Comments (0)

Key Differences

Device key advantages
Reasons to choose Xiaomi Redmi 15 4G
  • Larger display: 6.9in
  • Lighter design: 224g vs 232g
  • Higher battery capacity: 7000mAh vs 6600mAh
Reasons to choose Vivo X300 Ultra
  • Higher pixel density: 510ppi
  • Newer Bluetooth version: 5.4 vs 5
  • Supports newer USB: 3.2 vs 2
  • Supports DisplayPort
  • Supports Dolby Atmos

Versions

Available versions and configurations
Memory Options - 6/128 GB
- 8/256 GB		 - 12/256 GB
- 12/512 GB
- 16/512 GB
- 16/1024 GB

Review

Key Specs Xiaomi Redmi 15 4G and Vivo X300 Ultra
Display
Color accuracy, sharpness & brightness
Camera
Main & front camera tests
Performance
App & system performance
Games
3D gaming performance
Battery
Battery life, charging speed & type
Connectivity
Connectivity features
NanoReview Score
Overall score by NanoReview
Adjust each parameter’s importance to find the best match for you.
Customize your score
Function
Importance (Weight)
Display:
Camera:
Performance:
Gaming:
Battery:
Connectivity:
Higher weight means greater impact on NanoReview score.

Tests & specs

Specs & test comparison
Smartphones:
Xiaomi Redmi 15 4G
vs
Vivo X300 Ultra

Display

Display quality comparison
Type IPS LCD AMOLED
Size 6.9 in 6.82 in
Resolution 1080x2340 pixels 1440x3168 pixels
Aspect ratio 19.5:9 19.8:9
Pixel density 374 ppi 510 ppi
Refresh rate 144 Hz 144 Hz
Adaptive refresh rate Yes Yes
Max brightness n/a 1800 nits
HDR support No Yes, Dolby Vision
Screen-to-body ratio 83.1 % 90.3 %
Features n/a - DCI-P3
- Always-On Display
- DC dimming

Design & Build

Design and ergonomics comparison
Height 171.1 mm (6.74 in) 162.98 mm (6.42 in)
Width 82.1 mm (3.23 in) 76.81 mm (3.02 in)
Thickness 8.6 mm (0.34 in) 8.49 mm (0.33 in)
Weight 224 g (7.9 oz) 232 g (8.18 oz)
Water resistance IP64 IP69
Cooling system n/a Vapor chamber
Back panel Plastic Glass
Frame Plastic Metal
Colors - Black
- Gray
- Purple		 - Black
- Silver
- Green
Fingerprint sensor Yes, In-Button Yes, In-Display
Screen-to-body ratio
Xiaomi Redmi 15 4G
83.1 %
Vivo X300 Ultra
90.3 %

Performance

Testing Xiaomi Redmi 15 4G and Vivo X300 Ultra In benchmarks
Processor
Chipset Qualcomm Snapdragon 685 Qualcomm Snapdragon 8 Elite Gen 5
Max Frequency 2800 MHz 4600 MHz
CPU Cores 8 (4 + 4) 8 (2 + 6)
Architecture - 4/1.9 (Cortex-A53)
- 4/2.8 (Cortex-A73)		 - 6/3.63 (Oryon Gen 3 Performance)
- 2/4.61 (Oryon Gen 3 Prime)
Process TSMC TSMC
Transistor Size 6 nm 3 nm
Neural Processor Hexagon 686 Hexagon
Graphics Adreno 610 n/a
GPU Cores 128 n/a
GPU Frequency 1260 MHz n/a
FLOPS 322.6 GFLOPS n/a
GeekBench v6
Geekbench 6 (Single-Core)
Xiaomi Redmi 15 4G
475
Vivo X300 Ultra
3621
Geekbench 6 (Multi-Core)
Xiaomi Redmi 15 4G
1514
Vivo X300 Ultra
10653
Geekbench 6 (Single-Core)4753621
Geekbench 6 (Multi-Core)151410653
Sources: Geekbench v6 [Vivo X300 Ultra]
AnTuTu 10
AnTuTu 10
Xiaomi Redmi 15 4G
380990
Vivo X300 Ultra
4247433
CPU1148851192014
GPU579881543938
Memory103236525105
UX104881986376
NanoReview Score3809904247433

Memory

RAM
RAM Size 6 GB 12 GB
Memory Type LPDDR4X LPDDR5X
Memory Frequency 2133 MHz 5333 MHz
Channels 2 4
Storage
Storage Capacity128 GB256 GB
Storage TypeUFS 2.2UFS 4.1
Memory CardMicroSDNo

Software

OS Android 15 Android 16
UI Skin HyperOS 2.0 OriginOS 6

Battery

Volume 7000 mAh 6600 mAh
Max Charging Power 33 W 100 W
Battery Type n/a Silicon Carbon (Si/C)
Removable No No
Wireless Charging No Yes (40 W)
Reverse Charging No Yes
Fast Charging Yes Yes

Main camera

Matrix 50 MP 200 MP
Zoom Digital Optical, 3.7x
Flash LED Dual LED
Stabilization Digital Optical
8K Recording No Yes (Up to 30 fps)
4K Recording No Yes (Up to 120 fps)
1080p Recording Yes (Up to 30 fps) Yes (Up to 60 fps)
Slow Motion n/a 240 fps (1080p)
Wide-angle lens n/a 116 °
Lenses count Standard: 50 MP
Depth		 Standard: 200 MP
Telephoto: 200 MP
Ultra-wide: 50 MP
Features Bokeh effect - Bokeh effect
- Pro mode
- RAW support
Main lens
Matrix50 MP200 MP
Aperturef/1.8f/1.9
Focal lengthn/a35 mm
Sensorn/aSony LYT-901
Sensor sizen/a1/1.12 (0.89)
Pixel sizen/a0.7 μm
AutofocusPhase autofocusLaser autofocus
StabilizationDigitalOptical
Telephoto
Matrixn/a200 MP
Aperturen/af/2.7
Focal lengthn/a85 mm
Sensorn/aSamsung ISOCELL HPB
Sensor sizen/a1/1.4 (0.71)
Pixel sizen/a0.56 μm
Stabilizationn/aOptical
Ultra-wide lens
Matrixn/a50 MP
Aperturen/af/2.0
Focal lengthn/a14 mm
Sensorn/aSony LYT-818
Sensor sizen/a1/1.28 (0.78)
Pixel sizen/a1.22 μm
Stabilizationn/aOptical

Front camera

Matrix 8 MP 50 MP
Photo resolution n/a 8192x6144 pixels
Aperture f/2.0 f/2.5
Focal length n/a 24 mm
Sensor n/a Samsung ISOCELL JN1
Sensor size n/a 1/2.76 (0.36)
Pixel size n/a 0.64 μm
Autofocus No Phase autofocus
Stabilization Digital Digital
Video resolution 1080p (Full HD) at 30 fps 2160p (4K) at 60 fps
TOF 3D sensor No No

Connectivity

Wi-Fi version Wi-Fi 5 (802.11 a/b/g/n/ac) Wi-Fi 7 (802.11 a/b/g/n/ac/ax/be)
Wi-Fi features - Dual Band
- Wi-Fi Direct
- Wi-Fi Hotspot
- Wi-Fi Display		 - Dual Band
- Wi-Fi MiMO
- Wi-Fi Direct
- Wi-Fi Hotspot
- Wi-Fi Display
Bluetooth version 5 5.4
Bluetooth features LE LE
USB type USB Type-C USB Type-C
USB version 2 3.2
USB features - Charging
- USB Storage Mode
- OTG		 - Charging
- USB Storage Mode
- OTG
DisplayPort n/a Yes
GPS - GPS
- GLONASS
- Beidou
- Galileo		 - GPS
- GLONASS
- Beidou
- Galileo
- QZSS
NFC* Yes Yes
Infrared Port Yes Yes
Connectivity
SIM Count*22
SIM TypeNanoNano
SIM ModeDual SIM StandbyDual SIM Standby
eSIM Support *NoNo
Hybrid SlotNoNo
5G SupportNoYes

Sound

3.5 mm Jack Yes No
FM Radio No No
Dolby Atmos n/a Yes

Other

Class Budget Flagship
Announced August, 2025 yr March, 2026 yr
Release Date August, 2025 yr April, 2026 yr
MSRP ($) 150 1199
Sensors - Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor		 - Proximity Sensor
- Gyroscope
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor
Charger Included Yes, 33 W Yes, 80 W
* Attention! Config, frequencies, NFC, and other specs may vary by region.

Results

After analyzing the data, we consider Vivo X300 Ultra the clear winner in this comparison.

Survey

Which smartphone would you pick?
0 (0%)
0 (0%)
Total Votes: 0

User comments

Share your opinion or ask questions below