IB operations vs. GWM operations...

Hi all, I have applied to these positions (analyst) at two banks and viewed their websites to get the general idea on this, but I was wondering if anyone could offer any real world experience on how these two areas differ? Especially helpful if someone could explain GWM operations, which I am less knowledgeable in. I know how operations in general is looked upon, but which area is more marketable? Big differences in hours or pay? I know WM is very much a sales role, but operations does not entail much of that, correct? Thanks for the advice