How does a Saleen and Roush compare performance wise, especially handling?

I am just discovering all the different companies that produce kits etc although my taste is for a Saleen Speedster, I was wondering if someone could clue me in on how they compare to other kits and production sport companies

thanks!

if you are talking 2005+ roush has a better handling car, saleen definetly has more h.p... on the street the diference would be minimal.. go with what you like