Both Xiaomi Redmi K90 and OnePlus Ace 6 comes with same RAM. In terms of display resolution, OnePlus Ace 6 has better resolution of 2800 x 1272 than Xiaomi Redmi K90 which has resolution of 2510 x 1156. Both have the same amount of internal memory.
| Name | Xiaomi Redmi K90 | OnePlus Ace 6 | 
| RAM | 12 GB | 12 GB | 
|---|---|---|
| Display | 6.59 in | 6.83 in | 
| Internal Memory | 256 GB | 256 GB | 
| Battery | 7100 mAh | 7800 mAh | 
| Camera | 50 MP + 50 MP + 8 MP Triple | 50 MP + 16 MP Dual | 
| Price | Rs. 35990 | Rs. 31990 | 
The launch Date of the first phone is October 27, 2025. The Expected cost of Xiaomi Redmi K90 is Rs. 35990. The launch Date of the second phone is October 27, 2025. The Expected cost of OnePlus Ace 6 is Rs. 31990.
OnePlus Ace 6 has larger screen size of 6.83 inches in comparison to Xiaomi Redmi K90's 6.59 inch screen. Xiaomi Redmi K90 has AMOLED Screen type where as OnePlus Ace 6 has LTPO AMOLED Screen type. OnePlus's phone has display density of 450 PPI & Xiaomi's phone has only 419 PPI display density. In terms of screen to body ratio, OnePlus's phone has better screen to body ratio of ~ 90.1% than Xiaomi's phone ~ 87.5%. Both mobiles have same aspect ratio of 20:9.
Both phones come with 12 GB RAM and both have same Internal Memory of 256 GB.
They both have the same 50 MP + 50 MP + 8 MP Triple Rear Camera. Xiaomi Redmi K90 will be better choice if you're looking to click lot of selfies as it has better 20 MP Front Camera in comparison to OnePlus Ace 6's 16 MP Front Camera.
Both the phones run on Android Operating System Version 16.
| Name | Xiaomi Redmi K90 | OnePlus Ace 6 | 
| General | ||
| Model | K90 | PLQ110 | 
| Sim Type | Dual Sim, GSM+GSM | Dual Sim, GSM+GSM | 
| Dual Sim | Yes | Yes | 
| Sim Size | Nano+Nano SIM | Nano SIM | 
| Device Type | Smartphone | Smartphone | 
| Release Date | October 27, 2025 | October 27, 2025 | 
| Design | ||
| Dimensions | 75.25 x 157.49 x 8 mm | 77 x 163.4 x 8.3 mm | 
| Weight | 206 g | 213 g | 
| Bezel less | No | |
| Colors | Black, White, Silver | |
| Display | ||
| Type | Color AMOLED Screen (1B Colors) | Color LTPO AMOLED Screen (1B Colors) | 
| Touch | Yes, 480 Hz Touch Sampling Rate | Yes | 
| Size | 6.59 inches, 1156 x 2510 pixels, 120 Hz | 6.83 inches, 1272 x 2800 pixels, 165 Hz | 
| Aspect Ratio | 20:9 | 20:9 | 
| PPI | ~ 419 PPI | ~ 450 PPI | 
| Screen to Body Ratio | ~ 87.5% | ~ 90.1% | 
| Glass Type | Crystal Shield Glass | |
| Brightness | 3500nits | 800 nits (typ), 1800 nits (HBM) | 
| Features | PWM, HDR10+, Dolby Vision, HDR Vivid | |
| Notch | Yes, Punch Hole | Yes, Punch Hole | 
| Curved Display | Yes | |
| Memory | ||
| RAM | 12 GB | 12 GB | 
| Storage | 256 GB | 256 GB | 
| Storage Type | UFS 4 | UFS 4.1 | 
| Card Slot | No | |
| Connectivity | ||
| GPRS | Yes | Yes | 
| EDGE | Yes | Yes | 
| 3G | Yes | Yes | 
| 4G | Yes | Yes | 
| 5G | Yes | Yes | 
| 5G Bands | n1/n3/n5/n7/n8/n28/n66/n38/n40/n41/n48/n77/n78 | n1/n3/n5/n7/n8/n20/n28A/n38/n40/n41/n77/n78/n66 | 
| VoLTE | Yes | Yes, Dual Stand-By | 
| Vo5G | Yes | |
| Wifi | Yes, with wifi-hotspot | Yes, with wifi-hotspot | 
| Wifi Version | Wi-Fi 7 | Wi-Fi 7 | 
| Bluetooth | Yes, v5.4, A2DP, LE | Yes, v5.4 | 
| USB | Yes, USB-C v2.0 | Yes, USB-C v2.0 | 
| USB Features | USB on-the-go, USB Charging | USB Tethering, USB on-the-go, USB Charging | 
| IR Blaster | Yes | Yes | 
| Extra | ||
| GPS | Yes, with A-GPS. Up to tri-band: GLONASS, BDS, GALILEO, QZSS, NavIC | Yes with A-GPS | 
| Fingerprint Sensor | Yes, In Display | Yes, In Display | 
| Face Unlock | Yes | Yes | 
| Sensors | Accelerometer, Gyro, Proximity, Compass, Color Spectrum | Accelerometer, Gyro, Proximity, Compass | 
| 3.5mm Headphone Jack | No | No | 
| NFC | Yes | Yes | 
| Water Resistance | Yes, 1.5 m upto 30 min | |
| Splash Resistant | Yes | |
| IP Rating | IP68 | |
| Dust Resistant | No | Yes | 
| Camera | ||
| Rear Camera | 50 MP (Wide Angle) 50 MP (Telephoto) 8 MP (Wide Angle)  | 50 MP ƒ/1.8 (Wide Angle) 24mm (wide), PDAF, OIS 16 MP ƒ/2.4 (Ultra Wide)  | 
| OIS | Yes | Yes | 
| Auto Focus | Yes | Yes | 
| Features | Color Spectrum Sensor, HDR, Panorama | |
| Video Recording | 8K @ 24 fps UHD, 4K @ 30/60 fps UHD, 1080p @ 30/60 fps FHD, 720p @ 1920 fps HD | 4K @ 6 fps UHD, 1080p | 
| Flash | Yes, Dual LED | Yes, LED | 
| Front Camera | 20 MP (Wide Angle) Punch Hole  | 16 MP ƒ/2.4 (Wide Angle) Punch Hole, Screen Flash  | 
| Front Video Recording | 1080p @ 30 fps FHD | 1080p @ 30 fps FHD | 
| Technical | ||
| OS | Android v16 | Android v16 | 
| Custom UI | HyperOS 3 | ColorOS 16 | 
| Chipset | Qualcomm Snapdragon 8 Elite | Qualcomm Snapdragon 8 Elite | 
| CPU | 4.32 GHz, Octa Core Processor | 4.32 GHz, Octa Core Processor | 
| Core Details | 2x Prime Core@4.32 GHz & 6x Performance Core@3.53 GHz | 2x Prime Core@4.32 GHz & 6x Performance Core@3.53 GHz | 
| GPU | Adreno GPU | Adreno 830 | 
| Java | No | No | 
| Browser | Yes | Yes | 
| Multimedia | ||
| Supports | JPEG, PNG, BMP, GIF, WEB, HEIF, HEIC, DNG | |
| Yes | Yes | |
| Music | Yes | MP3, AAC, AAC+, WMA, AMR-NB, AMR-WB, WAV, FLAC, APE, OGG, MID, M4A, IMY, AC3, EAC3, EAC3-JOC, AC4 | 
| Video | Yes | Dolby Vision, HDR10, HDR10+, +HLG, HDRViVid, MKV, MOV, MP4, H.265 (HEVC), AVI, WMV, TS, 3GP, ASF, FLV, WEB | 
| FM Radio | No | No | 
| Document Reader | Yes | Yes | 
| Battery | ||
| Type | Non-Removable Battery | Non-Removable Battery | 
| Size | 7100 mAh | 7800 mAh, Si/C | 
| Fast Charging | Yes, 100W Fast charging | Yes, 120W SUPERVOOC Charging | 
| Reverse Charging | Yes, 22.5W | Yes, 10W |