My YC-20 is in the shop and my -30's are stored. My -45D is set up, though, so one of these days I'll do a side-by-side, as I've read that that's the one they modeled the Reface YC on. That said, it's never going to be perfect, mainly because the -45D has far more than just the footage drawbars. It wouldn't be a fair fight. I do think, however, that overall the Reface does a pretty good YC sound. And it's certainly different than the Vox sound.