I really like Yokohama tires and was wondering which tire is better from a wear, grip and quality standpoint??

I think STi tire is better.
When specC came out and beat EVO7 on race track,
some critics were saying RE070 on STi is helping a lot to beat EVO.
It is the same tire as NSX-typeR.

Hm..Spec C is overall a better car than the Evo7. I say that because Spec C is totally strip down to track car like, it doesn't have any luxury stuff, i.e. A/C. So you should compare Spec C to Evo.6 TM edition, they are more alike.