Re: Fulltone OCD vs Mad Professor Sweet Honey
I've used them both. OCD is a very good drive pedal with a little Marshall flavor. Decent amount of gain, but won't get you into metal territory. Has a bit of a scooped focus, and I know some people complain that it won't cut through, but wasn't an issue to me. Very touch sensitive. I no longer have mine, but have mostly good things to say about it. For the $, very tough to beat and fairly versatile.
Sweet Honey is a little different. Doesn't have the amount of gain that the OCD does, but enough for me. Also very touch sensitive. Doesn't have a tone control, but it's voiced so nicely, I don't feel it really needs one. It's a very good pedal by itself, but to me, it's absolutely incredible pushing other drive pedals (all set at lower to mid gain levels)...truly sweet, and for this reason alone, it's a keeper. I've heard some people say it's a bit bright, but again, not to me. It's on my board.
If making sure you've got a good amount of gain is important, then check out the OCD. It wouldn't be a bad place to start (and very likely stay). Around $100 on the used market. If you've got other drive pedals on the board and/or a ton of gain isn't important, look for a used CB-version Sweet Honey. In the event that either doesn't work for you, the $ should be recouped pretty easily.