I dunno the Variax Bass at all but it seems to not be editable which is a bummer. Also, no magnetic pickups for bass or 1st Gen Variax. Other than Acoustic 700 I would stay away from any Variax without Magnetic pickups and doesn’t use Workbench HD. If you must deal with original Variax guitars you will wanna keep an older computer OS available for Workbench software.
As good as Variax modeling is (and it’s pretty good) I never seem to find a “better” tone than the magnetic pickups on my current and well used JTV69, 59 & 59P. Now if I need a specific tuning or acoustic, resonator, sitar, 12strings, etc., it’s “‘good enough” in most contexts but when I no longer need the modeling I find myself turning it off and running on good old magnetic pickups.
Not wishing to upset the forum gods here - I will say I’ve also used better supported products from a company that starts with B and ends in SS - adding their pickup to guitars or basses I’ve enjoyed very good modeling and tuning freedom. It’s more foot control oriented than the Variax onboard controls but results are good if not great and palm muting actually seems to work…