forced widescreen uses a hack to make games look like real widescreen games instead of stretched games in full screen.Ok and whats the difference between force widescreen and wiiu widescreen?
so basicaly if you want the game to cover the whole screen(kinda) you need wiiu widescreen
if you want the game to not be stretched while covering the whole screen you need force widescreen, but remenber forced widescreen is a hack and manny games have major issues like random freezes, graphical glitches and such.