Ok Josh, here ya go, stock models, subbing the chip will probably get you more gain in the 'stang than in the roo:
2004-2005 WRX Sti: 0-60 4.7sec, 1/4mile 13.2sec, topspeed 152mph, mpg 18/24, $32,000.
2004 Ford Mustang Cobra: 0-60 4.5sec, 1/4mile 12.9sec, topspeed 155mph (electronic limited), mpg 16/24, $34,000.