What noticeable difference does the A12 bring compared to the A10?
The speed update is minor. The increment of the core won’t be too much noticeable – multi threading is not a necessity and not many apps can utilize that. The power management seems to be better. The RAM also seems to have upgraded from LPDDR4 (1600MHz base) to LPDDR4X (2133MHz base).
Please explain how it is going to matter when using (a) specific app (or apps).