I can easily agree on the PSV part but PSV + 3DS... I can't believe that. From what I remember most people just used their PSP (in USA) as emulators for NES, SNES, etc games.
PSP has Crisis Core: Final Fantasy VII,Dissidia: Final Fantasy,Dissidia 012: Duodecim Final Fantasy, Final Fantasy Type-0 all of them are exclusive spin off of Final fantasy games PSV+3DS had Final Fantasy X / X-2 HD Remaster it's a remake and not exclusive game and Theatrhythm: Final Fantasy and Theatrhythm Final Fantasy: Curtain Call and Final Fantasy Explorers they are exclusive spin off but they are low budgeted one.
PSP had Kingdom Hearts: Birth by Sleep and an unhanced version of it 3DS+PSV only 1 games
PSP had 2 high budget exclusive gta games and 1 spin off PSV+3DS 0 GTA games.
PSP had 5 metal gear solid games Peace walker,acid1,acid 2,ops portable 1 and ops portable 2 also exclusive to PSP Vita+3DS only 2
PSP had a lot more IP that are not only 3DS and Vita like Tekken,Midnight Club,Medal of Honor
Their also many other IP not as big as
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