I think it depends on what you're going for - to me, the Draenor wolves look a bit fuzzier and slightly more "dog" like (at least in my eyes), whereas I feel that the Legion wolves look more savage. I personally really love my white Legion wolf that I tamed. It took a bit to get past the eyes, but I've more or less made myself see the white reflection as the pupil, and it helped. But yes, be warned that they are very, very noisy. When you're questing it's probably not as noticeable since there's a lot going on anyway, but in town as I'm idling around, I am constantly hearing his little chuffs and growls and howls. I think it's cute now, to the point where I actually kind of miss the noise when I have a quieter pet out.
Anyway, my point is that it sort of depends on what you want from a wolf. If you want one that's a bit more "standard wolf", then the Draenor one probably works best. If you don't mind the mane and battle scars of a toughened, savage beast, then the Legion wolf is for you! I just wish the black Legion wolf was tamable...
![Crying or Very Sad :cry:](./images/smilies/icon_cry.gif)