Well no... if you go crazy with power rwd is fairly useless(without ALOT of cash spent on an awsome suspension set up, tyres etc etc). The awd system on a WRX dead standard is simply awsome, line one up in the wet and watch them go will you sit there snapping the back everytime you put your foot down, been there done that its damn annoying lol
If what you mean by fwd biased is they understeer abit, they handle 100 times better than an r33.
Saying all this i much prefer the r33 but if its anything other than straight line on the run the WRX will come out ontop modified or not.