The 100kw is a FWD engine ... only the AE86 had a 4AGE in RWD configuration - even the AW11 which was RWD still had its engine mounted traversely.
As for performance, there is a bit of difference in terms of acceleration - Riceboy's car is always quicker to accelerate but I'd put that down to my TVIS system only coming in at 4,000 rpm's or so. From then on, they are about even I think - I've yet to tune my car or get better headers etc.
It will cost you more though to fit the red top as you are converting the 100kw to RWD configuration.