Does anyone else find that their skin responds better to benzoyl peroxide than salicylic acid?

It just seems that every time I try to shift to using SA in place of "hardcore" BP, my skin just breaks out all over the place. Is this "purging" or does my skin just not like it? I REALLY wanted to like my Aveeno SA cream (especially for the soy-fading benefits), but I stopped using it and went back to OXY 10% (on the T-zone) and Neutragena 2.5% on the rest of my face in order to see if the SA was the major problem.

I guess I'm just getting frustrated - any advice?