It really depends on what style of music you play in. If you just want a DBish sort of sound go for the CR4. If you want to have a BG sort of sound at your disposal then go for the CR4M. The extra money goes into the mag pups and blending controls other than that they are the same. You can get a very authentic Jaco pastorius sound with the mags. With the bridge pup and DB strings it can sound quite DBish. It will never replace a DB though. Great basses by the way.