Samsung Galaxy S25 Ultra vs Xiaomi Redmi 8

94 out 100

VS

38 out 100

Compared 2 smartphones : Samsung Galaxy S25 Ultra Manufactured in February, 2025, with display 6.9 with chipsetQualcomm Snapdragon 8 Elite, vs Xiaomi Redmi 8, Manufactured in October, 2019with chipsetQualcomm Snapdragon 439. Below are specs, tests, pros and cons for each device

Key Differences

Device key advantages

Reasons to choose Samsung Galaxy S25 Ultra

Larger display: 6.9in
Higher pixel density: 498ppi
Higher refresh rate: 120Hz
Newer Bluetooth version: 5.4 vs 4.2
Supports newer USB: 3.2 vs 2
Supports DisplayPort
Supports Dolby Atmos
Built-in eSIM

Reasons to choose Xiaomi Redmi 8

Lighter design: 188g vs 218g
Infrared port

Versions

Available versions and configurations

Memory Options

- 12/256 GB
- 12/512 GB
- 12/1024 GB
- 16/1024 GB

- 3/32 GB
- 4/64 GB

Review

Key Specs Samsung Galaxy S25 Ultra and Xiaomi Redmi 8

Display

Color accuracy, sharpness & brightness

Samsung Galaxy S25 Ultra

96

Xiaomi Redmi 8

39

Camera

Main & front camera tests

Samsung Galaxy S25 Ultra

90

Xiaomi Redmi 8

42

Performance

App & system performance

Samsung Galaxy S25 Ultra

99

Xiaomi Redmi 8

18

Games

3D gaming performance

Samsung Galaxy S25 Ultra

98

Xiaomi Redmi 8

16

Battery

Battery life, charging speed & type

Samsung Galaxy S25 Ultra

97

Xiaomi Redmi 8

61

Connectivity

Connectivity features

Samsung Galaxy S25 Ultra

90

Xiaomi Redmi 8

47

NanoReview Score

Overall score by NanoReview

Samsung Galaxy S25 Ultra

94

Xiaomi Redmi 8

38

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.

Display

Display quality comparison

Type	Dynamic AMOLED	IPS LCD
Size	6.9 in	6.22 in
Resolution	1440x3120 pixels	720x1520 pixels
Aspect ratio	19.5:9	19:9
Pixel density	498 ppi	270 ppi
Refresh rate	120 Hz	60 Hz
Adaptive refresh rate	Yes (1-120 Hz)	No
Max brightness	2600 nits	400 nits
HDR support	Yes HDR10+	No
Touch Sampling Rate	240 Hz	n/a
Screen-to-body ratio	92.4 %	81.8 %
Features	- DCI-P3 - Always-On Display - DC dimming	n/a

Peak brightness (auto)

Samsung Galaxy S25 Ultra

1403 nits

Xiaomi Redmi 8

512 nits

sRGB gamut	97.7 %	95.7 %
PWM (Flicker)	240 Hz	n/a
Response time	1 ms	55.2 ms
Contrast	∞ Infinite	2308:1

Sources: NotebookCheck [Samsung Galaxy S25 Ultra], [Xiaomi Redmi 8]

Design & Build

Design and ergonomics comparison

Height	162.8 mm (6.41 in)	156.5 mm (6.16 in)
Width	77.6 mm (3.06 in)	75.4 mm (2.97 in)
Thickness	8.2 mm (0.32 in)	9.4 mm (0.37 in)
Weight	218 g (7.69 oz)	188 g (6.63 oz)
Water resistance	IP68	Yes
Cooling system	Vapor chamber	n/a
Back panel	Glass	Plastic
Frame	Metal	Plastic
Colors	- Black - Silver - Gray - Blue	- Black - Blue - Red
Fingerprint sensor	Yes In-Display	Yes rear

Screen-to-body ratio

Samsung Galaxy S25 Ultra

92.4 %

Xiaomi Redmi 8

81.8 %

Performance

Testing Samsung Galaxy S25 Ultra and Xiaomi Redmi 8 In benchmarks

Chipset	Qualcomm Snapdragon 8 Elite	Qualcomm Snapdragon 439
Max Frequency	4470 MHz	2000 MHz
CPU Cores	8 (2 + 6)	8 (4 + 4)
Architecture	- 6/3.53 (Oryon (Phoenix M)) - 2/4.32 (Oryon (Phoenix L))	- 4/1.45 (Cortex-A53) - 4/2 (Cortex-A53)
Process	TSMC	Samsung
Transistor Size	3 nm	12 nm
Neural Processor	Hexagon	Hexagon 536
Graphics	Adreno 830	Adreno 505
GPU Cores	1536	48
GPU Frequency	1100 MHz	450 MHz
FLOPS	3379.2 GFLOPS	43.2 GFLOPS

Geekbench 6 (Single-Core)

Samsung Galaxy S25 Ultra

3147

Xiaomi Redmi 8

476

Geekbench 6 (Multi-Core)

Samsung Galaxy S25 Ultra

9750

Xiaomi Redmi 8

1521

Geekbench 6 (Single-Core)	3147	476
Geekbench 6 (Multi-Core)	9750	1521
Geekbench Compute (GPU)	25681	n/a

Sources: Geekbench v6 [Samsung Galaxy S25 Ultra]

AnTuTu 10

Samsung Galaxy S25 Ultra

2795139

Xiaomi Redmi 8

151070

CPU	659871	55305
GPU	1294167	15306
Memory	471319	50584
UX	369782	29875
NanoReview Score	2795139	151070

Memory

RAM Size	- 12 GB - 16 GB	- 3 GB - 4 GB
Memory Type	LPDDR5X	LPDDR3
Memory Frequency	5333 MHz	933 MHz
Channels	2	1

Storage Capacity	- 256 GB - 512 GB - 1024 GB	- 32 GB - 64 GB
Storage Type	UFS 4.0	eMMC 5.1
Memory Card	No	MicroSD

Software

OS	Android 15	Android 9.0 (Upgradeable to Android 10)
OS Size	30.4 GB	15 GB
UI Skin	One UI 7.0	MIUI 12.5

Battery

Volume	5000 mAh	5000 mAh
Max Charging Power	45 W	18 W
Battery Type	Li-ion	Li-Po
Removable	No	No
Wireless Charging	Yes (25 W)	No
Reverse Charging	Yes (Wireless)	No
Fast Charging	Yes (72% in 30 min)	Yes Quick Charge 3.0 (50% in 85 min)
Full Charge Time	0:59 h	3:20 h

Battery Life

Samsung Galaxy S25 Ultra

31:10

Xiaomi Redmi 8

20:29

Web Browsing	11:10 h	08:09 h
Video Playback	19:32 h	10:10 h
Games	06:22 h	04:49 h
Standby Mode	160 h	110 h

Main camera

Matrix	200 MP	12 MP
Photo resolution	16320x12240 pixels	4000x3000 pixels
Zoom	Optical, 5x	Digital
Flash	LED	LED
Stabilization	Optical	Digital
8K Recording	Yes (Up to 30 fps)	No
4K Recording	Yes (Up to 120 fps)	No
1080p Recording	Yes (Up to 240 fps)	Yes (Up to 30 fps)
Slow Motion	240 fps (1080p)	120 fps (720p)
Wide-angle lens	120 °	113 °
Lenses count	Standard: 200 MP Telephoto: 50 MP Telephoto: 12 MP Ultra-wide: 50 MP	Standard: 12 MP Depth: 2 MP
Features	- Bokeh effect - Pro mode - RAW support	- Bokeh effect - Pro mode

Matrix	200 MP	12 MP
Aperture	f/1.7	f/1.8
Focal length	23 mm	n/a
Sensor	Samsung ISOCELL S5KHP2	Sony IMX363
Sensor size	1/1.3	1/2.55
Pixel size	0.6 μm	1.4 μm
Autofocus	Phase autofocus	Phase autofocus (Dual Pixel)
Stabilization	Optical	Digital

Matrix	50 MP	n/a
Aperture	f/3.4	n/a
Focal length	111 mm	n/a
Sensor	Sony IMX854	n/a
Sensor size	1/2.52	n/a
Pixel size	0.7 μm	n/a
Stabilization	Optical	n/a

Matrix	50 MP	n/a
Aperture	f/1.9	n/a
Focal length	13 mm	n/a
Sensor	Samsung ISOCELL S5KJN3	n/a
Sensor size	1/2.5	n/a
Pixel size	0.7 μm	n/a
Stabilization	Digital	n/a

Photo quality

Samsung Galaxy S25 Ultra

144

Xiaomi Redmi 8

n/a

Video quality

Samsung Galaxy S25 Ultra

143

Xiaomi Redmi 8

n/a

Overall camera score

Samsung Galaxy S25 Ultra

146

Xiaomi Redmi 8

n/a

Bokeh	70	n/a
Preview	81	n/a
Zoom	149	n/a

Sources: DxOMark [Samsung Galaxy S25 Ultra]

Front camera

Matrix	12 MP	8 MP
Photo resolution	4000x3000 pixels	3648x2190 pixels
Aperture	f/2.2	f/2.0
Focal length	26 mm	n/a
Sensor	Samsung S5K3LU	CMOS
Sensor size	1/3.2	1/4.0
Pixel size	1.12 μm	1.12 μm
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 7 (802.11 a/b/g/n/ac/ax/be)	Wi-Fi 4 (802.11 a/b/g/n)
Wi-Fi features	- Dual Band - Wi-Fi MiMO - Wi-Fi Direct - Wi-Fi Hotspot - Wi-Fi Display	- Wi-Fi Direct - Wi-Fi Hotspot - Wi-Fi Display
Bluetooth version	5.4	4.2
Bluetooth features	LE	LE, A2DP
USB type	USB Type-C	USB Type-C
USB version	3.2	2
USB features	- Charging - USB Storage Mode - OTG	- Charging - USB Storage Mode - USB-Host mode - OTG
DisplayPort	Yes DP 1.2	n/a
GPS	- GPS - GLONASS - Beidou - Galileo - QZSS	- GPS - GLONASS - Beidou
NFC*	Yes	No
Infrared Port	No	Yes

SIM Count*	1	2
SIM Type	Nano	Nano
SIM Mode	Dual SIM Standby	Dual SIM Standby
eSIM Support *	Yes	No
Hybrid Slot	No	No
2G Bands	GSM850, GSM900, DCS1800, PCS1900	GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
3G Bands	UMTS B1(2100),B2(1900),B4(AWS),B5(850),B8(900)	HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
LTE Bands*	LTE (B1/B2/B3/B4/B5/B7/B8/B12/B13/B14/B18/B19/B20/B25/B26/B28/B29/B30/B66/B71)	LTE (B1/B2/B3/B4(1700/B5/B7/B8/B20/B38/B40/B2100))
LTE category	n/a	4
5G Support	Yes	No

Sound

Speakers	Stereo	Mono
3.5 mm Jack	No	Yes
FM Radio	No	Yes
Dolby Atmos	Yes	No

Max Volume

Samsung Galaxy S25 Ultra

93 dB

Xiaomi Redmi 8

88.6 dB

Other

Class	Flagship	Budget
Announced	January, 2025 yr	October, 2019 yr
Release Date	February, 2025 yr	October, 2019 yr
Launch Price ($)	1299	140
Sensors	- Hall Sensor - Barometer - Proximity Sensor - Gyroscope - Accelerometer - Ambient Light Sensor - Compass - Fingerprint sensor	- Proximity Sensor - Accelerometer - Ambient Light Sensor - Compass - Fingerprint sensor
Charger Included	No	n/a

Note

Samsung Galaxy S25 Ultra:

Supports up to 2 eSIMs. The international model has 2 physical SIM slots, while the U.S. version has 1.","Uses Grade 5 titanium and Corning Gorilla Armor 2 glass on both sides.

Results

After analyzing the data, we consider Samsung Galaxy S25 Ultra the clear winner in this comparison.

Survey

Which smartphone would you pick?

Samsung Galaxy S25 Ultra

0 (0%)

Xiaomi Redmi 8

0 (0%)

Total Votes: 0

Samsung Galaxy S25 Ultra vs Xiaomi Redmi 8

Key Differences

Versions

Review

Tests & specs

Display

Design & Build

Performance

Memory

Software

Battery

Main camera

Front camera

Connectivity

Sound

Other

Note

Results

Survey

User comments