I m using redmi note 5 pro 64 gb variant I can play pugb on HD graphics on mia2 but only medium settings on Redmi note 5 pro. What this means is that mia2 is graphically one step ahead of Redmi note 5 pro. But mia2 has smaller battery capacity. Mia2 Camera is also slightly better than Red.
snap dragon 636 already enough for run heavy games moreover bettry 4000