The body of the 02-03 WRX is more rigid than the gc8. Due to the redesign they did alot to make the car more rigid and there is actually a beam that keeps the rear end of the car a lil more rigid. THe wagon isnt as rigid but is more versatile than the sedan.
Due to the past 2 years in rally with the 02 wrx Subaru has found more ways to make the car more rigid but still have the "luxury" feature such as a Sun roof for 04. Also the 04 WRX is more rigid than the 02-03 WRX and the 04 will have a Sunroof option.

 

which models had the fold down seats? i was told to try an older legacy/sedan model. did the older imprezas have fold down seats? anyone know which year/model to look for that would have all the parts (hardware, padding, etc) needed to modify for an '01 RS sports coupe? thnx.

 

just posted on my modifying my rear seats - "how to get folding rear seats in your GC8"