Re: Which Group Will End Up With More Success?
Very hard to say - almost 50/50 really. But if you put a gun to my head I'd go for group A.
In terms of slam winning ability I think it's virtually even with one player from each group having done it before and likely to do it again. It's impossible to predict who of them will end up with more, but since (so far) Kvitova is a very up and down player while Azarenka is more consistent Vika is more likely to be in the mix at the QF stage or beyond of a slam on more occasions than Petra. Than you have Wozniacki from group A and Radwanska and possibly Kerber from group B who might sneak one in if the draw works out for them and/or if they play the match of their life at exactly the right time.
In terms of the total number of tournaments they will end up winning I think that group A has the edge because of the consistency of Azarenka, Wozniacki and possibly Errani on clay (still remains to be seen if she'll continue to do as well as this year).
Just guessing though because the quality of the two groups is pretty equal.