I'm the Bassist (American-Made Fender Precision) I think the guitar your refering to is my buddy Cesar's Ibanez Xyphois. And yeah... he lays it down pretty F`in nice.
Yes, I've tried the bass, it is much harder than one would think because you have to hit the right low or high tone, much different than the guitar.
I suck at bass, well, I still need alot of work on guitar too but it's nice to have someone to practice and goof around with.
My fingers are like ground meat after getting that one bend right..ouch!!