I would pull the motor / tranny from the 95, do the clutch on it and do the maintenance work on the 95 engine.
The difference in mileage on the 2 engines is not worth considering, but maybe do the rod bearings when it is out and easy.
I would not swap anything between the 2 cars even though it is possible.
If there is something wrong with the 95 that you know of, then that is a different situation.
If you did swap engines, I would swap every sensor on the engine so that all the sensors remain in the original car. The 95 has a 2 speed fan, the 90 has a single speed, so things like that confuse me, as I don't know if the sensor plays a role, or if it is all done in the engine management system.
The 93s had a black interior option, and they do come up for grabs from time to time on this forum, but it is really difficult to change the dash, so that would be a non starter for me.