Saleen by far, performance is about the same. But imo Saleen has better quality materials used. I am not talking about making a clone, I am talking about buying the real thing.
My dad is looking at the 07 S281 SC and Stage III Roush and the Saleen has much better materials. The leather is nice, the gauge pod finished the car better, the body kit looks awesome, the suspension is better, the engineering on the exhaust is cool.
As far as the SN95 cars too, imo the same applies. Seats are nicer, wheels look better, body kit is WAY better looking, etc.