A stage 2 WRX would easily hold it's own against a stock SRT4.
I raced one at the local track when I was stage 2 & we were pretty much even. However, my 60' was 2.2, so take it for what it's worth. As far as the trannies go, both cars will grenade if abused, stock or modified.
So your stage 2 Rex was no faster than a stock srt-4...?