Thats the one with the spatial expander in it..sort of a 3D effect...i was thinking of getting one a while back for this and the reverbs and while i never got to play one i looked into it's specs a good bit,the effects are supposed to be very good but i read that for guitar systems there is too long a dropout between changing patches live..i think it was designed for studios more so than live use....i'm still keeping an eye out for a SE-70 if i see one cheap...