If you're comparing the cars as complete stockers, the EVO is a much better all round performance car.
If you're the type that likes to modify your car though, then that is a different story altogether.
Rotary's respond very well to even the most minor modifications.
Not to say the EVO won't respond well to mod's but if you compare dollar for dollar, you will get much better gains from a rotor.
If you want a car that sticks to the road like glue, then a modified RX7 is definately not your car. the EVO wins here hands down.
The RX7 is strictly a 2 seater where the EVO can comfortably seat 5 adults.
As WRXKILLA said, you really need to test drive both cars before you make a decision.