I'm looking for any info from someone who's owned or played either of these pups. They're the same aside from the size (the SMB-4 is an EMG35 size while the SMB-5 is an EMG40 size). I know they're switchable from single to dual coil, but I'm interested in how they sound, in terms of warmth, clarity, etc. Not so concerned with the output level. Thanks for any answers.