I think the Mutt/basic handles are thinner than tan the small res-c also the res-c handles flare more. The MuttLE has the big choil to help deal with the small handles. I don't think the basic handles are RES-C ,they are more rubbery.
I have small hands but holding the YKLE and the MuttLE in either hand the MuttLY does feel a bit smaller. The Muttle and YKLE(after a good sharpening) are both fantastic knives that are not as popular as they should be.