94/95 are 4-5 years newer and would presumably be in better condition and have less mileage and regular wear and tear on them. This is all relative to how each of them were taken care of of course.
I don't think you have much to gain by selling a 93 to buy a 94. Unless it is in much better condition. But then again you might be better off getting any year Z that has been taken care of better.