The Stealth type runs the return pipe underneath the intercooler, no drilling or cutting required, i'd assume that it will breath better, as it has less bents and a shorter pipe then the original tube n fin type.
I've the tube n fin type, my return pipe runs across the above of the engine bay, and back to the throttle body, same as Evil's.
As for brands, it doesnt really matter unless you are chasing massive power, jap just kits can handle up to 300rkw+ with proper mods.