Re: Overdrive vs. Distortion ?
I don't want to confuse things further, but I've read a lot on hard-clipping diodes and soft-clipping diodes, (haven't understood most of it but I have read it). It all comes back to the shape of the waves I think. Distortion is much closer to a square wave, though not as close as fuzz. Of the three overdrive is the least square, hence the use of descriptive words such as smooth and buttery. Smoothness relates back to initial curve of the wave. So overdrive, distortion and fuzz can all be thought of as different progressive stages in the transition between a curved wave signal and a square one, I think.
Hope this helps, maybe someone who knows more than I do could either back me up on this or set everyone straight. I hate to be the cause of a mass misunderstanding on this subject. But I think I'm at least 45%/55% right, maybe.