Home Phone comparison Samsung Galaxy S21 Ultra and Xiaomi 15T Pro - Which is better?

Samsung Galaxy S21 Ultra vs Xiaomi 15T Pro

67 out 100
Samsung Galaxy S21 Ultra
VS
90 out 100
Xiaomi 15T Pro
Samsung Galaxy S21 Ultra
Xiaomi 15T Pro

Compared 2 smartphones : Samsung Galaxy S21 Ultra Manufactured in February, 2021, with display 6.8 with chipsetSamsung Exynos 2100, vs Xiaomi 15T Pro, Manufactured in September, 2025 with chipsetMediaTek Dimensity 9400 Plus. 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 Samsung Galaxy S21 Ultra
  • Higher pixel density: 515ppi
  • Supports newer USB: 3.2 vs 2
Reasons to choose Xiaomi 15T Pro
  • Larger display: 6.83in
  • Higher refresh rate: 144Hz
  • Lighter design: 210g vs 227g
  • Higher battery capacity: 5500mAh vs 5000mAh
  • Newer Bluetooth version: 6.0 vs 5.2
  • Infrared port

Versions

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

Review

Key Specs Samsung Galaxy S21 Ultra and Xiaomi 15T Pro
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:
Galaxy S21 Ultra
vs
Xiaomi 15T Pro

Display

Display quality comparison
Type Dynamic AMOLED AMOLED
Size 6.8 in 6.83 in
Resolution 1440x3200 pixels 1280x2772 pixels
Aspect ratio 20:9 19.5:9
Pixel density 515 ppi 447 ppi
Refresh rate 120 Hz 144 Hz
Adaptive refresh rate Yes (10-120 Hz) Yes (1-120 Hz)
Max brightness 1500 nits n/a
HDR support Yes HDR10+ Yes, Dolby Vision
Touch Sampling Rate n/a 480 Hz
Screen-to-body ratio 89.5 % 90.3 %
Features - DCI-P3
- Always-On Display		 - DCI-P3
- Always-On Display
- DC dimming
Display test
Peak brightness (auto)
Samsung Galaxy S21 Ultra
1019 nits
Xiaomi 15T Pro
n/a
Sources: NotebookCheck [Samsung Galaxy S21 Ultra]

Design & Build

Design and ergonomics comparison
Height 165.1 mm (6.5 in) 162.7 mm (6.41 in)
Width 75.6 mm (2.98 in) 77.9 mm (3.07 in)
Thickness 8.9 mm (0.35 in) 7.96 mm (0.31 in)
Weight 227 g (8.01 oz) 210 g (7.41 oz)
Water resistance IP68 IP68
Cooling system n/a Vapor chamber
Back panel Glass n/a
Frame Metal Metal
Colors - Black
- Silver
- Gray
- Blue		 - Black
- Gold
- Gray
Fingerprint sensor Yes In-Display Yes, In-Display
Screen-to-body ratio
Samsung Galaxy S21 Ultra
89.5 %
Xiaomi 15T Pro
90.3 %

Performance

Testing Samsung Galaxy S21 Ultra and Xiaomi 15T Pro In benchmarks
Processor
Chipset Samsung Exynos 2100 MediaTek Dimensity 9400 Plus
Max Frequency 2900 MHz 3630 MHz
CPU Cores 8 (1 + 3 + 4) 8 (1 + 3 + 4)
Architecture - 4/2.2 (Cortex-A55)
- 3/2.81 (Cortex-A78)
- 1/2.91 (Cortex-X1)		 - 4/2.4 (Cortex-A720)
- 3/3.3 (Cortex-X4)
- 1/3.73 (Cortex-X925)
Process Samsung TSMC
Transistor Size 5 nm 3 nm
Neural Processor Yes MediaTek NPU 890
Graphics Mali-G78 MP14 Mali-G925 Immortalis MP12
GPU Cores 896 1536
GPU Frequency 854 MHz 1612 MHz
FLOPS 1530.4 GFLOPS 4952.1 GFLOPS
GeekBench v6
Geekbench 6 (Single-Core)
Samsung Galaxy S21 Ultra
1449
Xiaomi 15T Pro
2731
Geekbench 6 (Multi-Core)
Samsung Galaxy S21 Ultra
3892
Xiaomi 15T Pro
8135
Geekbench 6 (Single-Core)14492731
Geekbench 6 (Multi-Core)38928135
Geekbench Compute (GPU)n/a20573
Sources: Geekbench v6 [Xiaomi 15T Pro]
AnTuTu 10
AnTuTu 10
Samsung Galaxy S21 Ultra
843008
Xiaomi 15T Pro
2718159
CPU232358601093
GPU2563561227523
Memory163007415530
UX191217474013
NanoReview Score8430082718159
3DMark Wild Life
3DMark Wild Life
Samsung Galaxy S21 Ultra
5221
Xiaomi 15T Pro
n/a
Max Surface Temp.40.8 °Cn/a
Stability69 %n/a
Graphics Test31 fpsn/a
Graphics Score5221n/a
Sources: 3DMark [Samsung Galaxy S21 Ultra]

Memory

RAM
RAM Size - 12 GB
- 16 GB		 12 GB
Memory Type LPDDR5 LPDDR5X
Memory Frequency 2750 MHz 5333 MHz
Channels 2 4
Storage
Storage Capacity- 128 GB
- 256 GB
- 512 GB		256 GB
Storage TypeUFS 3.1UFS 4.1
Memory CardNoNo

Software

OS Android 11 (Upgradeable to Android 14) Android 15
OS Size 26.4 GB n/a
UI Skin One UI 6 HyperOS 2.0

Battery

Volume 5000 mAh 5500 mAh
Max Charging Power 25 W 90 W
Battery Type Li-ion Li-Po
Removable No No
Wireless Charging Yes (15 W) Yes (50 W)
Reverse Charging Yes (Wireless) n/a
Fast Charging Yes (54% in 30 min) Yes (50% in 13 min)
Full Charge Time 1:11 h 0:36 h
Battery Life Test
Battery Life
Samsung Galaxy S21 Ultra
22:05
Xiaomi 15T Pro
n/a
Web Browsing07:58 hn/a
Video Playback13:59 hn/a
Games05:14 hn/a
Standby Mode111 hn/a

Main camera

Matrix 108 MP 50 MP
Photo resolution 12000x9000 pixels 8192x6144 pixels
Zoom Optical, 10x Optical, 5x
Flash Dual LED Dual LED
Stabilization Optical Optical
8K Recording Up to 24FPS Yes (Up to 30 fps)
4K Recording Yes (Up to 60 fps) Yes (Up to 120 fps)
1080p Recording Yes (Up to 60 fps) Yes (Up to 120 fps)
Slow Motion 960 fps (720p) 960 fps (1080p)
Wide-angle lens 120 ° 120 °
Lenses count Standard: 108 MP
Telephoto: 10 MP
Telephoto: 10 MP
Ultra-wide: 12 MP		 Standard: 50 MP
Telephoto: 50 MP
Ultra-wide: 12 MP
Features - Bokeh effect
- Pro mode
- RAW support		 - Bokeh effect
- Pro mode
- RAW support
Main lens
Matrix108 MP50 MP
Aperturef/1.8f/1.6
Focal length26 mm23 mm
SensorSamsung S5KHM3Omnivision OVX9100
Sensor size1/1.331/1.31
Pixel size0.8 μm1.2 μm
AutofocusLaser autofocusPhase autofocus
StabilizationOpticalOptical
Telephoto
Matrix10 MP50 MP
Aperturef/4.9f/3.0
Focal length240 mm115 mm
SensorSamsung S5K3J1Samsung S5KJN5
Sensor size1/2.651/2.76
Pixel size1.22 μm0.64 μm
StabilizationOpticalOptical
Ultra-wide lens
Matrix12 MP12 MP
Aperturef/2.2f/2.2
Focal length13 mm15 mm
SensorSony IMX563n/a
Sensor size1/2.551/3.06
Pixel size1.4 μmn/a
StabilizationDigitalDigital
Main camera DxOMark results
Photo quality
Samsung Galaxy S21 Ultra
121
Xiaomi 15T Pro
n/a
Video quality
Samsung Galaxy S21 Ultra
100
Xiaomi 15T Pro
n/a
Overall camera score
Samsung Galaxy S21 Ultra
115
Xiaomi 15T Pro
n/a
Bokeh70n/a
Preview67n/a
Zoom106n/a
Sources: DxOMark [Samsung Galaxy S21 Ultra]

Front camera

Matrix 40 MP 32 MP
Photo resolution 7864x5200 pixels n/a
Aperture f/2.2 f/2.2
Focal length 26 mm 21 mm
Sensor Samsung S5KGH1 CMOS
Sensor size 1/2.65 1/3.44
Pixel size 0.7 μm 0.64 μm
Autofocus Phase autofocus No
Stabilization Digital Digital
Video resolution 2160p (4K) at 60 fps 2160p (4K) at 60 fps
TOF 3D sensor No No
Selfie camera DxOMark results
Photo quality
Samsung Galaxy S21 Ultra
133
Xiaomi 15T Pro
n/a
Video quality
Samsung Galaxy S21 Ultra
140
Xiaomi 15T Pro
n/a

Connectivity

Wi-Fi version Wi-Fi 6E (802.11 a/b/g/n/ac/ax) Wi-Fi 7 (802.11 a/b/g/n/ac/ax/be)
Wi-Fi features - Dual Band
- Wi-Fi MiMO
- 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 5.2 6.0
Bluetooth features LE, A2DP LE
USB type USB Type-C USB Type-C
USB version 3.2 2
USB features - Charging
- USB Storage Mode
- USB-Host mode
- OTG		 - Charging
- USB Storage Mode
- OTG
DisplayPort n/a No
GPS - GPS
- GLONASS
- Beidou
- Galileo		 - GPS
- GLONASS
- Beidou
- Galileo
- QZSS
NFC* Yes Yes
Infrared Port No Yes
Connectivity
SIM Count*22
SIM TypeNanoNano
SIM ModeDual SIM StandbyDual SIM Standby
eSIM Support *YesYes
Hybrid SlotNoNo
2G BandsGSM 850, 900, 1800, 1900 MHzGSM 2/3/5/8
3G BandsWCDMA Band 1, 2, 4, 5, 8WCDMA B1/2/4/5/6/8/19
LTE Bands*LTE (B1/B2/B3/B4/B5/B7/B8/B12/B13/B17/B18/B19/B20/B25/B26/B28/B32/B38/B39/B40/B41/B66)LTE (B1/B2/B3/B4/B5/B7/B8/B12/B13/B17/B18/B19/B20/B25/B26/B28/B32/B66/B71)
LTE category24n/a
5G SupportYesYes

Sound

Speakers Stereo n/a
3.5 mm Jack No No
FM Radio No No
Dolby Atmos Yes Yes
Speaker Test
Max Volume
Samsung Galaxy S21 Ultra
88 dB
Xiaomi 15T Pro
n/a

Other

Class Flagship Flagship
Announced January, 2021 yr September, 2025 yr
Release Date February, 2021 yr September, 2025 yr
Launch Price ($) 1200 n/a
MSRP ($) n/a 899
Sensors - Hall Sensor
- Barometer
- Proximity Sensor
- Gyroscope
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor		 - Proximity Sensor
- Gyroscope
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor
Charger Included n/a No
* Attention! Config, frequencies, NFC, and other specs may vary by region.

Results

After analyzing the data, we consider Xiaomi 15T Pro the clear winner in this comparison.

Survey

Which smartphone would you pick?
1 (100%)
0 (0%)
Total Votes: 1

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