Redmi note 4 I am useing it but some I dont like sound good but not so high
Miui 8 is better miui 7 is not so good
Design wise I like mi note 3 its better build
Change is battery well optimized better then mi note 3 but still when prosess mi note3 better then mi note 4 value for money only 64gb value for money but still some issues like ram not fully optimized