I would think that the primary voicing will be a lot different with EL's instead of 6V6's. The main difference will be the tweaks like 69/80 mode, seperate loop, etc., and othersie I would expect it to sound a lot like an XTC 101b. I have a GF45, and have to say I like it a lot more then XTC 101b or the XTC Classic. Let us know how it turns out!