Haven't actually played either of those amps first hand, however, I've heard stuff recorded with both amp makes (I'm pretty sure Kenny Wayne Sheppard and this dude Scott Lerner use Fuchs, they sound pretty cool. I know Jimi Hazel from 24/7 Spyz uses a Koch amp as well). It's not the best judge of an amp's true tone to listen to a produced recording, but it's better than nothing I guess.