I've never tried the BassMax, but the RSII is a good pickup that sounds very natural. Good output with minimal feedback and clarity when properly fitted. It can be a bit finicky to get just right. I just fitted my second one tonight and it sounds very good at home. Let's see how it does tomorrow out.
BTW, I like your signature. James Carville once said,"There's nothing in the middle of the road but yellow lines and dead Armadillos".