well the difference beetween this game and 4 its that nero isnt in it and theres is dante and vergil lets see if a game without nero wich is multiplatform can sell better than a game with nero
But DMC4 had Dante in it.
Apparently you do not like him which is why you keep excluding him, but that isn't going to change the fact that he was the secondary lead in that game which means that it wasn't all Nero.
And as a said earlier, nothing supports DMC4 getting those sales solely on the fact that Nero was the lead.