Superb comparison as always! It's down to price and actual camera performance but the Xiaomi's photo accessory makes it very special! The Oppo has a better looking OS but that's subjective. That photo kit is not cheap but it's great! And optional. I would buy it just for that but I'm a photographer, who can't take photos with one hand!
Nothing Phone 2a wins in everything except the camera but u said the chip of the pixel is better the temsor chip is not better than the dimensity 7200 pro