Pacman knows as much as anyone about Roscoe's. Maybe Gard will chime in. I've had a couple, currently have a fretless and am having a fretted built for me. While the woods certainly do make a difference, I think in some cases it's subtle. I mean, you can tell, but I have yet to play a Roscoe I didn't like.
I like the Century body style. Just seems to fit me better. My fretless is mahogany with a special JB pickup placement. I think it sounds amazing for a nice modern fretless tone.
The fretted Century that I have being built is an ash body with CB soapbar pups. A pretty "standard" Roscoe combination. I still think there will be plenty of lows. This is the top that will be on it with a birdseye maple fingerboard.
Bottom line, Roscoe is making incredible basses right now. If the one you played spoke to you, get it. The basses are amazing. The company is amazing. The people who work there are amazing. Heck, they've put up with enough from me over the last year to last a lifetime, but they still work with me and have made me amazing basses with extra touches I wouldn't have expected.