Side-by-side technical data
Xiaomi Redmi K90 Ultra vs Xiaomi Redmi K90
Comparison between Xiaomi Redmi K90 Ultra and Xiaomi Redmi K90: camera, battery, fast charging, display, performance and colors, side by side. More phones from Xiaomi.
NeoTeo's verdict
Which of the two is the better buy
The Xiaomi Redmi K90 Ultra suits buyers who prioritize a very bright display and a larger battery; the Redmi K90 is easier to carry and adds a telephoto camera. They are closely matched overall, so the choice rests on those priorities.
The Ultra has a 6.83″ display versus 6.59″, with 165 Hz versus 120 Hz, 9,500 nits versus 3,500 nits, and 447 ppi versus 419 ppi. Its battery is also larger at 8,550 mAh versus 7,100 mAh, while both phones support 100 W charging, reverse charging, and reverse wireless charging.
The Redmi K90 weighs 206 g versus 227 g for the Ultra and is the one with a telephoto camera. The Ultra’s main camera instead uses a larger 1/1.43″ sensor versus 1/1.55″, 1.13 µm pixels versus 1 µm, and an f/1.7 aperture versus f/1.9.
Xiaomi Redmi K90 Ultra
The Xiaomi Redmi K90 Ultra is the better buy for 9,500 nits, 165 Hz, and an 8,550 mAh battery.
Xiaomi Redmi K90
The Xiaomi Redmi K90 is the better buy for buyers who want a lighter phone and a telephoto camera.
The verdict
Neither runs away with it: each wins something.
| Category | Redmi K90 Ultra | Redmi K90 |
|---|---|---|
| Design & display | 8.6 | 8.8 |
| Performance & hardware | 9.1 | 9.3 |
| Camera | 7.4 | 7.6 |
| Connectivity | 7.9 | 7.9 |
| Battery & charging | 8.3 | 8.3 |
Which one is for you?
Xiaomi Redmi K90 Ultra, if you care about…
- Battery Capacity
- 8,550 mAh
- against 7,100 mAh
- Display Refresh Rate
- 165 Hz
- against 120 Hz
- Peak Display Brightness
- 9,500 nits
- against 3,500 nits
- Display Pixel Density
- 447 ppi
- against 419 ppi
Xiaomi Redmi K90, if you care about…
- Weight
- 206 g
- against 227 g
Specification comparison
Performance
| Specification | Redmi K90 Ultra | Redmi K90 |
|---|---|---|
| Processor Model | Qualcomm Snapdragon 8 Elite | Qualcomm Snapdragon 8 Elite |
| Processor Process Size | 3 nm | 3 nm |
| Graphics GPU | Qualcomm Adreno 830 | Qualcomm Adreno 830 |
| Storage Type | UFS 4.1 | UFS 4.1 |
| Maximum CPU Clock | 4.32 GHz | 4.47 GHz Best value |
| Maximum Storage Capacity | 1 TB | 1 TB |
| AnTuTu Score | 3,081,184 | 2,920,000 |
| Geekbench 6 Single-Core | 3,234 | 3,234 |
| Geekbench 6 Multi-Core | 10,059 | 10,059 |
| CPU Description | Octa-core CPU with 2x4.32 GHz and 6x3.53 GHz cores | Octa-core processor with 2x4.32 GHz Oryon V2 Phoenix L cores and 6x3.53 GHz Oryon V2 Phoenix M cores. |
| Processor Type | Octa-Core | Octa-Core |
| 64-Bit Processor | Yes | Yes |
| RAM Capacity | 16 GB | 16 GB |
| RAM Type | LPDDR5X | LPDDR5X |
| AnTuTu version | v11 | v10 |
Design
| Specification | Redmi K90 Ultra | Redmi K90 |
|---|---|---|
| Body Colors | Black, Blue, Silver | Black, White, Blue, Purple |
| Body Thickness | 8.2 mm | 8 mm Best value |
| Body Width | 77.9 mm | 75.3 mm |
| Body Height | 162.9 mm | 157.5 mm |
| Weight | 227 g | 206 g Best value |
| Usable Surface | 90.3 % Best value | 89.8 % |
| Body Materials | Glass, Aluminium Alloy | Glass, Aluminium Alloy |
| Resistance Features | IP68, IP69, IP66 | IP68, IP69 |
| Waterproof Depth | 1.5 m | 1.5 m |
Battery
| Specification | Redmi K90 Ultra | Redmi K90 |
|---|---|---|
| Battery Capacity | 8,550 mAh Best value | 7,100 mAh |
| Battery Type | Si-Carbon Li-Ion | Si-Carbon Li-Ion |
| Fast Charge Power | 100 W | 100 W |
| Battery Features | Non-Removable, Fast Charging, Reverse Charging, Reverse Wireless Charging, Rechargeable, Battery Level Indicator | Non-Removable, Rechargeable, Fast Charging, Reverse Charging, Reverse Wireless Charging, Battery Level Indicator |
| Reverse wireless charging power | 22.5 W | 22.5 W |
Display
| Specification | Redmi K90 Ultra | Redmi K90 |
|---|---|---|
| Display Aspect Ratio | 19.5:9 | 19.5:9 |
| Display Technology | AMOLED | AMOLED |
| Peak Display Brightness | 9,500 nits Best value | 3,500 nits |
| Display Diagonal | 6.83″ Best value | 6.59″ |
| Display Horizontal Resolution | 1,280 px Best value | 1,156 px |
| Display Vertical Resolution | 2,772 px Best value | 2,510 px |
| Display Pixel Density | 447 ppi Best value | 419 ppi |
| Display Refresh Rate | 165 Hz Best value | 120 Hz |
| Touch Sampling Rate | 480 Hz | 480 Hz |
| Display Contrast Ratio | 8,000,000 :1 | — |
| Display Features | Hole-Punch Notch, HDR10, HDR10+, Dolby Vision, Always-On Display, Capacitive Touch, Multi-Touch, Gorilla Glass, DC Dimming, DCI-P3, TÜV Rheinland Low Blue Light, TÜV Rheinland Flicker-Free Certified, TÜV Rheinland Eye Comfort Certification, Scratch Resistant, Frameless | Hole-Punch Notch, LTPO, Dolby Vision, HDR10+, HDR10, Always-On Display, Capacitive Touch, Multi-Touch, DC Dimming, DCI-P3, 10-Bit Panel, 120Hz, 2,592Hz PWM, TÜV Rheinland Low Blue Light, TÜV Rheinland Flicker-Free Certified, TÜV Rheinland Eye Comfort Certification, Scratch Resistant |
Sensors
| Specification | Redmi K90 Ultra | Redmi K90 |
|---|---|---|
| Fingerprint Sensor Placement | Under Display | Under Display |
Sensor
| Specification | Redmi K90 Ultra | Redmi K90 |
|---|---|---|
| Sensor Features | Fingerprint Sensor, Accelerometer, Proximity Sensor, Gyroscope, Compass, Hall Sensor, Light Sensor, RGB Sensor, Cooling System | Fingerprint Sensor, Accelerometer, Gyroscope, Proximity Sensor, Compass, Light Sensor, RGB Sensor, Ultrasonic Proximity Sensor, Cooling System |
Software
| Specification | Redmi K90 Ultra | Redmi K90 |
|---|---|---|
| Operating System | Android 16 | Android 16 |
| OS Family | Android | Android |
| OS Version | 16 | 16 |
Connectivity
| Specification | Redmi K90 Ultra | Redmi K90 |
|---|---|---|
| SIM Configurations | Dual Nano-SIM, Dual SIM Dual Standby | Dual Nano-SIM, Dual SIM Dual Standby |
| Cellular Bands | 2G GSM 850, 2G GSM 900, 2G GSM 1800, 2G GSM 1900, 3G UMTS B1, 3G UMTS B2, 3G UMTS B3, 3G UMTS B4, 3G UMTS B5, 3G UMTS B6, 3G UMTS B8, 3G UMTS B19, 4G LTE B1, 4G LTE B3, 4G LTE B4, 4G LTE B5, 4G LTE B7, 4G LTE B8, 4G LTE B19, 4G LTE B28A, 4G LTE B34, 4G LTE B38, 4G LTE B39, 4G LTE B40, 4G LTE B41, 4G LTE B42, 4G LTE B48, 4G LTE B66, 5G NR n1, 5G NR n3, 5G NR n5, 5G NR n7, 5G NR n8, 5G NR n28a, 5G NR n38, 5G NR n40, 5G NR n41, 5G NR n48, 5G NR n66, 5G NR n77, 5G NR n78 | 2G GSM 850, 2G GSM 900, 2G GSM 1800, 2G GSM 1900, 3G UMTS 800, 3G UMTS B850, 3G UMTS B900, 3G UMTS 1700 AWS, 3G UMTS 1900, 3G UMTS 2100, 4G LTE B1, 4G LTE B3, 4G LTE B4, 4G LTE B5, 4G LTE B7, 4G LTE B8, 4G LTE B19, LTE B28, 4G LTE B34, 4G LTE B38, 4G LTE B39, 4G LTE B40, 4G LTE B41, 4G LTE B42, 4G LTE B48, 4G LTE B66, 5G NR n1, 5G NR n3, 5G NR n5, 5G NR n7, 5G NR n8, 5G NR n28, 5G NR n38, 5G NR n40, 5G NR n41, 5G NR n48, 5G NR n66, 5G NR n77, 5G NR n78 |
| Cellular Technologies | GSM, HSPA, LTE, 5G | GSM, HSPA, LTE, 5G |
| Wi-Fi Standards | Wi-Fi 4 (802.11n), Wi-Fi 5 (802.11ac), Wi-Fi 6 (802.11ax), Wi-Fi 7 (802.11be), Wi-Fi 802.11a/b/g | Wi-Fi 4 (802.11n), Wi-Fi 5 (802.11ac), Wi-Fi 6 (802.11ax), Wi-Fi 7 (802.11be), Wi-Fi 802.11a/b/g |
| Wi-Fi Features | Dual Band, Wi-Fi Hotspot, Wi-Fi Direct, Wi-Fi Display, MIMO | Dual Band, Wi-Fi Hotspot, Wi-Fi Direct, Wi-Fi Display, MIMO |
| Bluetooth Version | Bluetooth 5.4 | Bluetooth 5.4 |
| Bluetooth Profiles | A2DP, LE, LHDC 5.0, ASHA, Auracast | A2DP, LE, LHDC 5.0, ASHA |
| Navigation Systems | GPS, A-GPS, GLONASS, BeiDou, Galileo, QZSS, NavIC | GPS, A-GPS, GLONASS, BeiDou, Galileo, QZSS, NavIC |
| Connectivity Features | USB Charging, USB Mass Storage, USB OTG, USB Type-C, NFC, Computer Sync, OTA Sync, Tethering, Infrared, VoLTE | Infrared, NFC, USB Type-C, USB OTG, USB Host 2.0, USB 3.2, Computer Sync, DLNA, OTA Sync, Tethering, VoLTE, USB Charging, USB Mass Storage |
| USB Version | USB 3.2 | USB 3.2 |
| Max. download speed | 10,000 Mbps | 10,000 Mbps |
| Max. upload speed | 3,500 Mbps | 3,500 Mbps |
Audio
| Specification | Redmi K90 Ultra | Redmi K90 |
|---|---|---|
| Audio Features | Stereo Speakers, Dolby Atmos, Hi-Res Audio, Hi-Res Wireless Audio, A2DP, LE, LHDC 5, ASHA, Auracast | Stereo Speakers, Dolby Atmos, Noise-Cancellation Microphone, Hi-Res Audio, Hi-Res Wireless Audio, LHDC 5, ASHA, A2DP, LE |
Technical
| Specification | Redmi K90 Ultra | Redmi K90 |
|---|---|---|
| Model numbers | 2604FRK1EC | 2510DRK44C |
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