You're second post prove both handheld could had games will good sale i think kingdoms hearts and resident evil can have better sales on Vita then 3ds but Dragon Quest and Puzzle & Dragons wouldn't have higther sale on 3ds.
PS4 - over 100 millions let's say 120m
Xbox One - 70m
Wii U - 25m
Vita - 15m if it will not get Final Fantasy Kingdoms Heart and Monster Hunter 20m otherwise
3DS - 80m







