Xiaomi 15 Ultra vs Xiaomi Redmi 8

95 out 100

VS

38 out 100

Compared 2 smartphones : Xiaomi 15 Ultra Manufactured in February, 2025, with display 6.73 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 Xiaomi 15 Ultra

Larger display: 6.73in
Higher pixel density: 522ppi
Higher refresh rate: 120Hz
Higher battery capacity: 5410mAh vs 5000mAh
Newer Bluetooth version: 6.0 vs 4.2
Supports newer USB: 3.2 vs 2
Supports DisplayPort
Supports Dolby Atmos
Built-in eSIM
Includes charger

Reasons to choose Xiaomi Redmi 8

Lighter design: 188g vs 226g

Versions

Available versions and configurations

Memory Options

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

- 3/32 GB
- 4/64 GB

Review

Key Specs Xiaomi 15 Ultra and Xiaomi Redmi 8

Display

Color accuracy, sharpness & brightness

Xiaomi 15 Ultra

97

Xiaomi Redmi 8

39

Camera

Main & front camera tests

Xiaomi 15 Ultra

95

Xiaomi Redmi 8

42

Performance

App & system performance

Xiaomi 15 Ultra

96

Xiaomi Redmi 8

18

Games

3D gaming performance

Xiaomi 15 Ultra

96

Xiaomi Redmi 8

16

Battery

Battery life, charging speed & type

Xiaomi 15 Ultra

97

Xiaomi Redmi 8

61

Connectivity

Connectivity features

Xiaomi 15 Ultra

98

Xiaomi Redmi 8

47

NanoReview Score

Overall score by NanoReview

Xiaomi 15 Ultra

95

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	AMOLED	IPS LCD
Size	6.73 in	6.22 in
Resolution	1440x3200 pixels	720x1520 pixels
Aspect ratio	20:9	19:9
Pixel density	522 ppi	270 ppi
Refresh rate	120 Hz	60 Hz
Adaptive refresh rate	Yes (1-120 Hz)	No
Max brightness	n/a	400 nits
HDR support	Yes Dolby Vision	No
Touch Sampling Rate	300 Hz	n/a
Screen-to-body ratio	90 %	81.8 %
Features	- DCI-P3 - Always-On Display - DC dimming	n/a

Peak brightness (auto)

Xiaomi 15 Ultra

1599 nits

Xiaomi Redmi 8

512 nits

sRGB gamut	99.7 %	95.7 %
PWM (Flicker)	120 Hz	n/a
Response time	1 ms	55.2 ms
Contrast	∞ Infinite	2308:1

Sources: NotebookCheck [Xiaomi 15 Ultra], [Xiaomi Redmi 8]

Design & Build

Design and ergonomics comparison

Height	161.3 mm (6.35 in)	156.5 mm (6.16 in)
Width	75.3 mm (2.96 in)	75.4 mm (2.97 in)
Thickness	9.35 mm (0.37 in)	9.4 mm (0.37 in)
Weight	226 g (7.97 oz)	188 g (6.63 oz)
Water resistance	IP68	Yes
Cooling system	Vapor chamber	n/a
Back panel	Glass	Plastic
Frame	Metal	Plastic
Colors	- White - Black - Silver - Green	- Black - Blue - Red
Fingerprint sensor	Yes In-Display	Yes rear

Screen-to-body ratio

Xiaomi 15 Ultra

90 %

Xiaomi Redmi 8

81.8 %

Performance

Testing Xiaomi 15 Ultra and Xiaomi Redmi 8 In benchmarks

Chipset	Qualcomm Snapdragon 8 Elite	Qualcomm Snapdragon 439
Max Frequency	4320 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)

Xiaomi 15 Ultra

3008

Xiaomi Redmi 8

476

Geekbench 6 (Multi-Core)

Xiaomi 15 Ultra

9065

Xiaomi Redmi 8

1521

Geekbench 6 (Single-Core)	3008	476
Geekbench 6 (Multi-Core)	9065	1521

Sources: Geekbench v6 [Xiaomi 15 Ultra]

AnTuTu 10

Xiaomi 15 Ultra

2544373

Xiaomi Redmi 8

151070

CPU	558586	55305
GPU	1040161	15306
Memory	520300	50584
UX	425326	29875
NanoReview Score	2544373	151070

Memory

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

Storage Capacity	256 GB	- 32 GB - 64 GB
Storage Type	UFS 4.1	eMMC 5.1
Memory Card	No	MicroSD

Software

OS	Android 15	Android 9.0 (Upgradeable to Android 10)
OS Size	23.9 GB	15 GB
UI Skin	HyperOS 2.0	MIUI 12.5

Battery

Volume	5410 mAh	5000 mAh
Max Charging Power	90 W	18 W
Battery Type	Silicon Carbon (Si/C)	Li-Po
Removable	No	No
Wireless Charging	Yes (80 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	0:51 h	3:20 h

Battery Life

Xiaomi 15 Ultra

30:03

Xiaomi Redmi 8

20:29

Web Browsing	12:19 h	08:09 h
Video Playback	18:43 h	10:10 h
Games	06:45 h	04:49 h
Standby Mode	141 h	110 h

Main camera

Matrix	50 MP	12 MP
Photo resolution	8192x6144 pixels	4000x3000 pixels
Zoom	Optical, 4.3x	Digital
Flash	Dual 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 60 fps)	Yes (Up to 30 fps)
Slow Motion	1920 fps (1080p)	120 fps (720p)
Wide-angle lens	115 °	113 °
Lenses count	Standard: 50 MP Telephoto: 200 MP Telephoto: 50 MP Ultra-wide: 50 MP Depth	Standard: 12 MP Depth: 2 MP
Features	- Bokeh effect - Pro mode - RAW support	- Bokeh effect - Pro mode

Matrix	50 MP	12 MP
Aperture	f/1.63	f/1.8
Focal length	23 mm	n/a
Sensor	Sony LYT-900	Sony IMX363
Sensor size	1/1.0	1/2.55
Pixel size	1.6 μm	1.4 μm
Autofocus	Laser autofocus	Phase autofocus (Dual Pixel)
Stabilization	Optical	Digital

Matrix	200 MP	n/a
Aperture	f/2.6	n/a
Focal length	100 mm	n/a
Sensor	Samsung ISOCELL S5KHP9	n/a
Sensor size	1/1.4	n/a
Pixel size	0.56 μm	n/a
Stabilization	Optical	n/a

Matrix	50 MP	n/a
Aperture	f/2.2	n/a
Focal length	14 mm	n/a
Sensor	Samsung S5KJN5	n/a
Sensor size	1/2.76	n/a
Pixel size	0.64 μm	n/a
Stabilization	Digital	n/a

Photo quality

Xiaomi 15 Ultra

158

Xiaomi Redmi 8

n/a

Video quality

Xiaomi 15 Ultra

134

Xiaomi Redmi 8

n/a

Overall camera score

Xiaomi 15 Ultra

153

Xiaomi Redmi 8

n/a

Bokeh	80	n/a
Preview	89	n/a

Sources: DxOMark [Xiaomi 15 Ultra]

Front camera

Matrix	32 MP	8 MP
Photo resolution	6528x4896 pixels	3648x2190 pixels
Aperture	f/2.0	f/2.0
Focal length	22 mm	n/a
Sensor	Omnivision OV32B	CMOS
Sensor size	1/3.14	1/4.0
Pixel size	0.7 μm	1.12 μm
Autofocus	No	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	6.0	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	n/a
GPS	- GPS - GLONASS - Beidou - Galileo - QZSS - NAVIC	- GPS - GLONASS - Beidou
NFC*	Yes	No
Infrared Port	Yes	Yes

SIM Count*	2	2
SIM Type	Nano	Nano
SIM Mode	Dual SIM Standby	Dual SIM Standby
eSIM Support *	Yes	No
Hybrid Slot	No	No
2G Bands	GSM 2/3/5/8	GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
3G Bands	WCDMA 1/2/4/5/6/8/19	HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
LTE Bands*	LTE (B1/B2/B3/B4/B5/B7/B8/B12/B17/B18/B19/B20/B26/B28/B34/B38/B39/B40/B41/B42/B48/B66)	LTE (B1/B2/B3/B4(1700/B5/B7/B8/B20/B38/B40/B2100))
LTE category	n/a	4
5G Support	Yes	No

Sound

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

Max Volume

Xiaomi 15 Ultra

92.1 dB

Xiaomi Redmi 8

88.6 dB

Other

Class	Flagship	Budget
Announced	February, 2025 yr	October, 2019 yr
Release Date	February, 2025 yr	October, 2019 yr
Launch Price ($)	n/a	140
MSRP ($)	1099	n/a
Sensors	- Barometer - Proximity Sensor - Gyroscope - Accelerometer - Ambient Light Sensor - Compass - Fingerprint sensor	- Proximity Sensor - Accelerometer - Ambient Light Sensor - Compass - Fingerprint sensor
Charger Included	Yes 90 W	n/a

Note

Xiaomi 15 Ultra:

The Chinese version of the Xiaomi 15 Ultra has a 6000 mAh battery, while the international model comes with 5410 mAh, leading to a noticeable difference in battery life.

Results

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

Survey

Which smartphone would you pick?

Xiaomi 15 Ultra

0 (0%)

Xiaomi Redmi 8

0 (0%)

Total Votes: 0

Xiaomi 15 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