- Xiaomi Redmi S2

* Weighs 14.5 grams less
* Has a built-in infrared port

- Infinix Note 12i

* Comes with 1920 mAh larger battery capacity: 5000 vs 3080 mAh
* Has a 0.71 inch larger screen size
* 46% higher pixel density (393 vs 269 PPI)
* Modern USB Type-C port
* Compatible with Wi-Fi 5 wireless networks
* Newer Bluetooth version (v5)
* Supports 33W fast charging
* Thinner bezels – 11.2% more screen real estate
* The phone is 4-years newer
* Uses a faster type of memory: LPDDR4X
* Stereo speakers
* More recent OS version: Android 11 versus 10

With the above listed key differences, i think the Infinix Note 12i is definitely a better buy.