Home Phone comparison Samsung Galaxy S20 Ultra and Xiaomi Redmi 15 4G - Which is better?

Samsung Galaxy S20 Ultra vs Xiaomi Redmi 15 4G

65 out 100
Samsung Galaxy S20 Ultra
VS
60 out 100
Xiaomi Redmi 15 4G
Samsung Galaxy S20 Ultra
Xiaomi Redmi 15 4G

Compared 2 smartphones : Samsung Galaxy S20 Ultra Manufactured in March, 2020, with display 6.9 with chipsetSamsung Exynos 990, vs Xiaomi Redmi 15 4G, Manufactured in August, 2025with chipsetQualcomm Snapdragon 685. 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 S20 Ultra
  • Higher pixel density: 511ppi
  • Lighter design: 220g vs 224g
  • Supports newer USB: 3.1 vs 2
  • Supports Dolby Atmos
  • Built-in eSIM
Reasons to choose Xiaomi Redmi 15 4G
  • Higher refresh rate: 144Hz
  • Higher battery capacity: 7000mAh vs 5000mAh
  • Infrared port
  • Includes charger

Versions

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

Review

Key Specs Samsung Galaxy S20 Ultra and Xiaomi Redmi 15 4G
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.
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Function
Importance (Weight)
Display:
Camera:
Performance:
Gaming:
Battery:
Connectivity:
Higher weight means greater impact on NanoReview score.

Tests & specs

Specs & test comparison
Smartphones:
Galaxy S20 Ultra
vs
Xiaomi Redmi 15 4G

Display

Display quality comparison
Type Dynamic AMOLED IPS LCD
Size 6.9 in 6.9 in
Resolution 1440x3200 pixels 1080x2340 pixels
Aspect ratio 20:9 19.5:9
Pixel density 511 ppi 374 ppi
Refresh rate 120 Hz 144 Hz
Adaptive refresh rate No Yes
Max brightness 800 nits n/a
HDR support Yes HDR10+ No
Screen-to-body ratio 90.6 % 83.1 %
Features - DCI-P3
- Always-On Display		 n/a
Display test
Peak brightness (auto)
Samsung Galaxy S20 Ultra
886 nits
Xiaomi Redmi 15 4G
n/a
sRGB gamut99.2 %n/a
PWM (Flicker)240 Hzn/a
Response time6.2 msn/a
Contrast∞ Infiniten/a
Sources: NotebookCheck [Samsung Galaxy S20 Ultra]

Design & Build

Design and ergonomics comparison
Height 166.9 mm (6.57 in) 171.1 mm (6.74 in)
Width 76 mm (2.99 in) 82.1 mm (3.23 in)
Thickness 8.8 mm (0.35 in) 8.6 mm (0.34 in)
Weight 220 g (7.76 oz) 224 g (7.9 oz)
Water resistance IP68 IP64
Cooling system Vapor chamber n/a
Back panel Glass Plastic
Frame Metal Plastic
Colors - Black
- Gray		 - Black
- Gray
- Purple
Fingerprint sensor Yes In-Display Yes, In-Button
Screen-to-body ratio
Samsung Galaxy S20 Ultra
90.6 %
Xiaomi Redmi 15 4G
83.1 %

Performance

Testing Samsung Galaxy S20 Ultra and Xiaomi Redmi 15 4G In benchmarks
Processor
Chipset Samsung Exynos 990 Qualcomm Snapdragon 685
Max Frequency 3020 MHz 2800 MHz
CPU Cores 8 (2 + 2 + 4) 8 (4 + 4)
Architecture - 4/2 (Cortex-A55)
- 2/2.5 (Cortex-A76)
- 2/2.73 (Exynos M5)		 - 4/1.9 (Cortex-A53)
- 4/2.8 (Cortex-A73)
Process Samsung TSMC
Transistor Size 7 nm 6 nm
Neural Processor Yes Hexagon 686
Graphics Mali-G77 MP11 Adreno 610
GPU Cores 704 128
GPU Frequency 800 MHz 1260 MHz
FLOPS 1126 GFLOPS 322.6 GFLOPS
GeekBench v6
Geekbench 6 (Single-Core)
Samsung Galaxy S20 Ultra
1159
Xiaomi Redmi 15 4G
475
Geekbench 6 (Multi-Core)
Samsung Galaxy S20 Ultra
3158
Xiaomi Redmi 15 4G
1514
Geekbench 6 (Single-Core)1159475
Geekbench 6 (Multi-Core)31581514
AnTuTu 10
AnTuTu 10
Samsung Galaxy S20 Ultra
760316
Xiaomi Redmi 15 4G
380990
CPU220525114885
GPU22501157988
Memory146451103236
UX168329104881
NanoReview Score760316380990
3DMark Wild Life
3DMark Wild Life
Samsung Galaxy S20 Ultra
4320
Xiaomi Redmi 15 4G
n/a
Max Surface Temp.38.6 °Cn/a
Stability53 %n/a
Graphics Test25 fpsn/a
Graphics Score4320n/a
Sources: 3DMark [Samsung Galaxy S20 Ultra]
PCMark 3.0
PCMark 3.0
Samsung Galaxy S20 Ultra
11163
Xiaomi Redmi 15 4G
n/a
Writing score13391n/a
Web score8714n/a
Video editing6104n/a
Data manipulation9006n/a
NanoReview Score11163n/a

Memory

RAM
RAM Size - 12 GB
- 16 GB		 6 GB
Memory Type LPDDR5 LPDDR4X
Memory Frequency 3200 MHz 2133 MHz
Channels 2 2
Storage
Storage Capacity- 128 GB
- 512 GB		128 GB
Storage TypeUFS 3.0UFS 2.2
Memory CardMicroSDMicroSD

Software

OS Android 10.0 (Upgradeable to Android 13) Android 15
OS Size 23.7 GB n/a
UI Skin One UI 5.1 HyperOS 2.0

Battery

Volume 5000 mAh 7000 mAh
Max Charging Power 45 W 33 W
Battery Type Li-ion n/a
Removable No No
Wireless Charging Yes (15 W) No
Reverse Charging Yes (Wireless) No
Fast Charging Yes (100% in 80 min) Yes
Full Charge Time 1:20 h n/a
Battery Life Test
Battery Life
Samsung Galaxy S20 Ultra
18:01
Xiaomi Redmi 15 4G
n/a
Web Browsing06:27 hn/a
Video Playback11:23 hn/a
Games04:23 hn/a
Standby Mode91 hn/a

Main camera

Matrix 108 MP 50 MP
Photo resolution 12032x9204 pixels n/a
Zoom Optical, 4x Digital
Flash LED LED
Stabilization Optical Digital
8K Recording Up to 24FPS No
4K Recording Yes (Up to 60 fps) No
1080p Recording Yes (Up to 60 fps) Yes (Up to 30 fps)
Slow Motion 960 fps (720p) n/a
Wide-angle lens 120 ° n/a
Lenses count Standard: 108 MP
Telephoto: 48 MP
Ultra-wide: 12 MP
Depth: 0.3 MP		 Standard: 50 MP
Depth
Features - Bokeh effect
- Pro mode
- RAW support		 Bokeh effect
Main lens
Matrix108 MP50 MP
Aperturef/1.8f/1.8
Focal length26 mmn/a
SensorSamsung Bright S5KHM1n/a
Sensor size1/1.33n/a
Pixel size0.8 μmn/a
AutofocusPhase autofocus (Dual Pixel)Phase autofocus
StabilizationOpticalDigital
Telephoto
Matrix48 MPn/a
Aperturef/3.5n/a
Focal length103 mmn/a
SensorSony IMX586n/a
Sensor size1/2n/a
Pixel size0.8 μmn/a
StabilizationOpticaln/a
Ultra-wide lens
Matrix12 MPn/a
Aperturef/2.2n/a
Focal length13 mmn/a
SensorSamsung S5K2LAn/a
Sensor size1/2.55n/a
Pixel size1.4 μmn/a
StabilizationDigitaln/a

Front camera

Matrix 40 MP 8 MP
Photo resolution 7864x5200 pixels n/a
Aperture f/2.2 f/2.0
Focal length 26 mm n/a
Sensor Samsung S5KGH1 n/a
Sensor size 1/2.65 n/a
Pixel size 0.7 μm n/a
Autofocus Phase autofocus (Dual Pixel) No
Stabilization Digital Digital
Video resolution 2160p (4K) at 60 fps 1080p (Full HD) at 30 fps
TOF 3D sensor No No

Connectivity

Wi-Fi version Wi-Fi 6 (802.11 b/g/n/ac/ax) Wi-Fi 5 (802.11 a/b/g/n/ac)
Wi-Fi features - Wi-Fi Direct
- Wi-Fi Display		 - Dual Band
- Wi-Fi Direct
- Wi-Fi Hotspot
- Wi-Fi Display
Bluetooth version 5 5
Bluetooth features LE, A2DP LE
USB type USB Type-C USB Type-C
USB version 3.1 2
USB features - Charging
- USB Storage Mode
- OTG		 - Charging
- USB Storage Mode
- OTG
GPS - GPS
- GLONASS
- Beidou
- Galileo		 - GPS
- GLONASS
- Beidou
- Galileo
NFC* Yes Yes
Infrared Port No Yes
Connectivity
SIM Count*22
SIM TypeNanoNano
SIM ModeDual SIM StandbyDual SIM Standby
eSIM Support *YesNo
Hybrid SlotYesNo
2G BandsGSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2n/a
3G BandsHSDPA 850 / 900 / 1900 / 2100n/a
LTE Bands*LTE (B850/B900/B1700/B1900/B2100)n/a
LTE category22n/a
5G SupportYesNo

Sound

Speakers Stereo n/a
3.5 mm Jack No Yes
FM Radio No No
Dolby Atmos Yes n/a
Speaker Test
Max Volume
Samsung Galaxy S20 Ultra
84.4 dB
Xiaomi Redmi 15 4G
n/a

Other

Class Flagship Budget
Announced February, 2020 yr August, 2025 yr
Release Date March, 2020 yr August, 2025 yr
Launch Price ($) 1400 n/a
MSRP ($) n/a 150
Sensors - Hall Sensor
- Barometer
- Proximity Sensor
- Gyroscope
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor		 - Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor
Charger Included n/a Yes, 33 W
* Attention! Config, frequencies, NFC, and other specs may vary by region.

Results

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