Well, the 5's tend to not have that big of a difference in string spacing from a 4, maybe just alittle narrower spacings. But the 6's (for Carvin at least), it seems Carvin try to cram too many strings in there. If there was an extra inch and a half between the B and C string at the bridge I'd be more than happy. It kills my fingers when slapping (and I do a good bit of it), the skin at the top of my fingernails rubs against the strings frequently when popping and it gets painful after a while. One day I'll get a 6 that has huge string spacings. I saw on their website that Carvin offers a Bunny Brunel model 6 now (but without the wider neck, drat!).