It's a weird aspect of the market dynamic, but I've seen it time and again, that when a game comes out even just a month later one platform after another, it goes largely ignored on that 'late comer' platform, even by people who *only* own that console and have no other means of playing it. It's as if the excitement over the game has expired, everyone has moved on, etc.
Now, it's not always the case, but it seems to be the case really often. IMO, it's never a good idea to stagger the releases like that if you want to maximize sales.