I think they might be. On my board I've got a Small Fry, a modded RAT, and a Keeley-mod SD1. The RAT has a bit of a fuzz quality to it when you crank up the gain so that's cool. But in general there's not drastic differences between the tones I'm getting. I'm thinking of adding something to get more diversity but what? Distortion, fuzz. I'm playing rock/jazz/blues so I'm not after metal tones or anything way over the top.