Beware, beauty's only fin-deep. The SG-Z, lovely as it looked, was one of the crappiest basses ever produced by Gibson, its short tenure was in the late 90ies and it sank like the Bismarck (which at least had the decency to flood itself after it had become a defenseless wreck).
The pups looked like TB+ ones, if only they had been, but were something different altogether, totally weak-ass and de-balled, no bass oomph at all, a pathetic middish sound emitted. Perhaps Jaco would have liked it after pulling the frets.
The Genobird might be superfluous, but it can't sound no way near as bad.