ericee - performance wise, i think both cars are pretty much the same. it boils down to personal liking. some like the shape of the evo, some prefer the scooby. i personally loves the boxer engine, it much more "garang" than the 4G63. Nevertheless, a modded Evo sounds pretty impressive too. For me, the deciding factor was that scooby uses a TMIC (top mount intercooler) whilst the evo uses a FMIC (front mount intercooler). If you intend for the car to be modded to 400hp and above, the TMIC is not suitable. So, you see many scooby's who has 400hp and above converted to a FMIC, which requires some modification to the engine bay, re-routing the pipings etc. Not that I have any immediate intentions to push for 400hp, but it gives me less headaches if ever Dr. Jekyl takes over me...
You should also ask scooby owners on why they chose a scooby instead of an evo. Our member S9 has both. He can give you a 2-way perspective.