Screen size
Black Shark 4S Pro6.7"
Redmi K90 MaxWinner: 6.8"+2.3%
Quick verdict
Redmi K90 Max leads the measured specs 11-6.
Measured wins
Black Shark 4S Pro
6
spec wins
Ties
6
equal specs
Redmi K90 Max
11
spec wins
Overall winner
Screen size
Technology
Black Shark 4S Pro
GSM / CDMA / HSPA / EVDO / LTE / 5G
Redmi K90 Max
GSM / HSPA / LTE / 5G
2G bands
Black Shark 4S Pro
GSM 850 / 900 / 1800 / 1900 , CDMA 800 & TD-SCDMA
Redmi K90 Max
GSM 850 / 900 / 1800 / 1900
3G bands
Black Shark 4S Pro
HSDPA 800 / 850 / 900 / 1700(AWS) / 1900 / 2100 , CDMA2000 1xEV-DO
Redmi K90 Max
HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
4G bands
Black Shark 4S Pro
Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
RAM
Storage
equal specsMain camera
Front camera
equal specsBattery
Wired charging
Weight
Thickness
IP rating
Wi‑Fi
Bluetooth
USB
5G support
equal specsNFC
equal specs3.5mm jack
SD card
equal specsStereo speakers
equal specs1, 2, 3, 4, 5, 7, 8, 18, 19, 20, 26, 28, 34, 38, 39, 40, 41
Redmi K90 Max
1, 3, 4, 5, 7, 8, 19, 28, 34, 38, 39, 40, 41, 42, 43, 48, 66
5G bands
Black Shark 4S Pro
1, 3, 8, 28, 41, 77, 78, 79 SA/NSA
Redmi K90 Max
1, 3, 5, 7, 8, 28, 34, 38, 39, 40, 41, 48, 77, 78 SA/NSA
Speed
Black Shark 4S Pro
HSPA, LTE, 5G
Redmi K90 Max
HSPA, LTE, 5G
Announced
Black Shark 4S Pro
2021, October 13
Redmi K90 Max
2026, April 21
Status
Black Shark 4S Pro
Available. Released 2021, October 16
Redmi K90 Max
Available. Released 2026, April 21
Dimensions
Black Shark 4S Pro
163.7 x 76.2 x 9.9 mm (6.44 x 3.00 x 0.39 in)
Redmi K90 Max
162.9 x 77.9 x 8.2 mm (6.41 x 3.07 x 0.32 in)
Weight
Black Shark 4S Pro
220 g (7.76 oz)
Redmi K90 Max
227 g (8.01 oz)
SIM
Black Shark 4S Pro
Nano-SIM + Nano-SIM
Redmi K90 Max
Nano-SIM + Nano-SIM
Other
Black Shark 4S Pro
Physical pop-up gaming triggers
Redmi K90 Max
IP68/IP69 dust tight and water resistant (high pressure water jets; immersible up to 1.5m for 30 min) Built-in cooling fan
Build
Black Shark 4S Pro
-
Redmi K90 Max
Glass front (Dragon Crystal Glass), aluminum frame, glass-fiber reinforced plastic back or silicone polymer back
Type
Black Shark 4S Pro
Super AMOLED, 144Hz, HDR10+, 1300 nits (peak)
Redmi K90 Max
AMOLED, 68B colors, 165Hz, Dolby Vision, HDR10+, HDR Vivid, 3500 nits (peak)
Size
Black Shark 4S Pro
6.67 inches, 107.4 cm2 (~86.1% screen-to-body ratio)
Redmi K90 Max
6.83 inches, 114.5 cm2 (~90.3% screen-to-body ratio)
Resolution
Black Shark 4S Pro
1080 x 2400 pixels, 20:9 ratio (~395 ppi density)
Redmi K90 Max
1280 x 2772 pixels, 19.5:9 ratio (~447 ppi density)
Protection
Black Shark 4S Pro
-
Redmi K90 Max
Dragon Crystal Glass
OS
Black Shark 4S Pro
Android 11, Joy UI 12.8
Redmi K90 Max
Android 16, HyperOS 3
Chipset
Black Shark 4S Pro
Qualcomm SM8350 Snapdragon 888+ 5G (5 nm)
Redmi K90 Max
MediaTek Dimensity 9500 (3 nm)
CPU
Black Shark 4S Pro
Octa-core (1x3.0 GHz Cortex-X1 & 3x2.42 GHz Cortex-A78 & 4x1.80 GHz Cortex-A55)
Redmi K90 Max
Octa-core (1x4.21 GHz C1-Ultra & 3x3.5 GHz C1-Premium & 4x2.7 GHz C1-Pro)
GPU
Black Shark 4S Pro
Adreno 660
Redmi K90 Max
Mali-G1 Ultra MC12
Card slot
Black Shark 4S Pro
No
Redmi K90 Max
No
Internal
Black Shark 4S Pro
256GB 8GB RAM, 256GB 12GB RAM, 512GB 16GB RAM
Redmi K90 Max
256GB 12GB RAM, 256GB 16GB RAM, 512GB 12GB RAM, 512GB 16GB RAM, 1TB 16GB RAM
Other
Black Shark 4S Pro
UFS 3.1
Redmi K90 Max
UFS 4.1
Triple
Black Shark 4S Pro
64 MP, f/1.8, (wide), 1/1.97", 0.7µm, PDAF 8 MP, f/2.2, 120˚ (ultrawide), 1/4.0", 1.12µm 5 MP (macro), AF
Redmi K90 Max
-
Features
Black Shark 4S Pro
LED flash, HDR, panorama
Redmi K90 Max
LED flash, HDR, panorama
Video
Black Shark 4S Pro
4K@30/60fps, 1080p@30/60/240fps, 1080p@960fps; HDR10+
Redmi K90 Max
8K@30fps, 4K@30/60fps, 1080p@30/60/120/240/960fps, gyro-EIS
Dual
Black Shark 4S Pro
-
Redmi K90 Max
50 MP, f/1.7, 24mm (wide), 1/1.55", 1.0µm, PDAF, OIS 8 MP, f/2.2, (ultrawide), 1/4.0", 1.12µm
Single
Black Shark 4S Pro
20 MP, f/2.5, (wide), 0.8µm
Redmi K90 Max
20 MP (wide)
Features
Black Shark 4S Pro
HDR
Redmi K90 Max
HDR
Video
Black Shark 4S Pro
1080p@30fps
Redmi K90 Max
1080p@30/60fps
Loudspeaker
Black Shark 4S Pro
Yes, with stereo speakers
Redmi K90 Max
Yes, with stereo speakers (with Dolby Atmos)
3.5mm jack
Black Shark 4S Pro
Yes
Redmi K90 Max
No
Other
Black Shark 4S Pro
24-bit/192kHz Hi-Res audio
Redmi K90 Max
Tuned by Bose Bose 2.1 stereo sound system with a woofer 24-bit/192kHz Hi-Res & Hi-Res wireless audio
WLAN
Black Shark 4S Pro
Wi-Fi 802.11 a/b/g/n/ac/6, dual-band, Wi-Fi Direct
Redmi K90 Max
Wi-Fi 802.11 a/b/g/n/ac/6/7, dual-band, Wi-Fi Direct
Bluetooth
Black Shark 4S Pro
5.2, A2DP, LE, aptX HD, aptX Adaptive
Redmi K90 Max
5.4, A2DP, LE, LHDC 5, Auracast, ASHA, MIHC
Positioning
Black Shark 4S Pro
GPS, GLONASS, GALILEO, QZSS, BDS
Redmi K90 Max
GPS (L1+L5), BDS (B1I+B1c+B2a+B2b), GALILEO (E1+E5a+E5b), QZSS (L1+L5), GLONASS, NavIC
NFC
Black Shark 4S Pro
Yes
Redmi K90 Max
Yes
Radio
Black Shark 4S Pro
No
Redmi K90 Max
No
USB
Black Shark 4S Pro
USB Type-C 2.0
Redmi K90 Max
USB Type-C
Infrared port
Black Shark 4S Pro
-
Redmi K90 Max
Yes
Sensors
Black Shark 4S Pro
Fingerprint (side-mounted), accelerometer, gyro, proximity, compass, barometer
Redmi K90 Max
Fingerprint (under display, ultrasonic), accelerometer, proximity, gyro, compass
Type
Black Shark 4S Pro
Li-Po 4500 mAh
Redmi K90 Max
8550 mAh
Charging
Black Shark 4S Pro
120W wired, 50% in 5 min, 100% in 15 min
Redmi K90 Max
100W wired, 100W PPS, PD3.0 22.5W reverse wired
Colors
Black Shark 4S Pro
Black, White
Redmi K90 Max
Silver, Blue, Black
Price
Black Shark 4S Pro
About 650 EUR
Redmi K90 Max
About 440 EUR