So you're only getting one version, and you decide to get this one? Why? 99% chance it will be inferior. Though your purchase will increase sale numbers by like 50%, it won't help, because most people are smart enough to stay away from this crap, so the sales are going to be bad, and Ubisoft will complain. In other words, there's no point in supporting it. Ubisoft is already done with us, all you're doing now is giving them money they don't deserve.
I'm all fo supporting Wii u as much as possible, and I personally wouldn't buy this game at all, but since you're planning to, it just makes no sense to get the Wii U version.
In fact you're more likely to do good for Wii U if you don't buy this game. If it could sell pretty much zero copies worldwide, we have a better chance of making it clear we won't buy crap than if it even half decently. Don't get me wrong, it's not very likely, we all know no matter what, it's always "our fault" but maybe maybe some news outlets will feel more inclined to report the real reason or something since more of a statement is made that way.
I simply don't believe the game is worth playing unless your using a tablet controller. It's a game that has you using a cell phone to hack a smart city. Why should I use anything else besides a touch screen controller?