Depends on your budget.
If you have a smaller budget, go for the 33 GTST. Bearing in mind the costs of insurance and maintenance.
If you have some leeway, go the 32 GTR. If you can afford to maintain it, pay for insurance and pay for repairs if something goes wrong, then I can't see why you'd choose the 33. That said, you'd be better of buying a clean example to start with. Spend a bit more now, so you save in the long run.
Either car is great, just stick to your budget.