The Roscoe does have a hotter output and a more modern sound. However, you have to like the Bartolini sound...
The FBass on the other hand has a great preamp that is organic sounding and versatile. I find the BN's to be more ergonomic. They output is a little lower on the FBass - but that's what gain knobs are for.
BTW, you can also look at the FBass VF series - it's their take on the classic Jazz bass. Hotter output, 34" scale, and you can get alder body/rosewood board or ash body/maple board standard...