Before I owned my supra, I owned a z32 and imo it's a nice car. The after-market support is good and the car is fairly cheap to upgrade. All one needs to get into the 400+ hp range is the upgraded ecu (i wish our cars had these), exhaust, intake, clutch, and a boost controller (15 psi). I liked how the z32 looks and handles, but my main problem with the car was working on it; there's like no room to work on the car. I guess it's a good car for someone who is experienced working on cars, but for someone like me, it wasn't an ideal platform. I had to always hope nothing would go wrong with it. However one day something did go wrong (bad piston rings), and my mechanic was going to charge me an arm to fix it. He would charge like 50% less to work on a supra.
So here's my opinions on the pros and cons of each car:
Z32 con:
tight engine bay
expensive to repair
Z32 pros:
Good after-market support
Looks nice
Handles well
easy power with just a few mods
Supra cons:
doesn't look as nice as the z32 (my opinion)
no cheap aftermarket ecu upgrade
I want to say that it doesn't handle as nice as the z32, but I'm not sure which car has more better handling potential.
Supra pros:
easy to work on since the engine bay isn't as crammed as the z32
cheap to repair
after-market parts are cheap
Overall, I would give the edge to the z32. I sold my z32 and purchased a Supra mainly because it's easier to work on and repair on it is cheap. Also please I'm not hating on the Supra, and I wouldn't have purchased a Supra if I didn't like it; these are just my opinions.