AII is a strange one.............in a low output humbucker, sub DC8K it can sound bright with a slightly hollow mid and warm/clear highs.In a more powerful pickup, say DC14K it is all mid with a syrupy high and mushy bass.
Like all things, in the right application it can sound great but in comparison AIV is better balanced, a touch more power and clearer highs.
for the Mul I always go for AIV...................a Stormy Monday sounds great with either although I'd never recommend AII for a neck slot, it's just not defined enough.