I don't have a Roscoe, but I'm pretty familiar with them, having spent the last year agonizing over specs to place a custom order, only to realize it was just out of my reach dollarwise.
The Roscoe pickup location makes a huge difference, in a good or bad way depending on your taste and need. It sounds like a P-bass with the neck pickup soloed, and it sound very modern, mid-forward with both pickups on, although clarity and articulation might not be the best with both pickups on because a lot of frequencies get cancelled. Bridge pickup solo would be super punchy and mid-rangy, with not a lot of bottom unless you crank the bass.
I'm very familiar with the setup because I have had three Sadowsky 5-24s, which sound similar to the typical Roscoe pickup location.
Regarding woods, well, sure, different woods will have slight effect on sound, but having an active preamp on board should let you dial what you are looking for. I usually like ash bodies and maple fretboard, and recently got an alder/rosewood bass, and actually the alder/rosewood sound a lot brighter because of the pickups installed. . . so in the grand scheme of things, I think that wood species are not the most transforming element on the sound.
Roscoe neck dimensions and description seem to be one of the most comfortable out there, which is in part why I wanted one, but I couldn't deal with their standard 35" scale, and getting a custom 34" scale meant spending
at least $4000 . . .
Anyway, I still love Roscoe and now with their new pickup options (vintage style Aguilar) they really have all options covered, whether want a P or J sound, or an MM, or a Bartolini sound.
Some Roscoe videos to give you an idea of the sound:
https://www.youtube.com/watch?v=Gc0uxg40V70This one is Colombian cumbia (an adquired taste) but gives you a good idea on how they sound on a mix)
https://www.youtube.com/watch?v=PZgj9rZUAFMhttps://www.youtube.com/watch?v=aMOzAvmOvDg