ok pros and cons...
gt2- pros- faster, more torque, cons- not as many colors .one seat, more expensive

gt3rs- pros- more racecar look ex. roll cage
colors- bright orange, frog green, two seats, less expensive

cons- not as fast

if u r a racer and want to catch girls and put em on ur lap then da GT2 will do da job
if a r just a regular guy then da GT3 RS and then no girls on da lap

Personally, l would not mind either car. The GT2 has slightly faster acceleration (0-60 in 3.4 seconds vs 3.7 seconds) due to having far more power (530hp vs 415hp). Its top speed is about 10mph faster than the GT3 RS (202mph vs 193mph). However, the GT3 RS would probably be faster around most racetracks & definintely any technical track. As good as the GT2 is chassis is, the GT3 RS is so spot-on that it would blow the GT2 out of the water. However, in daily life the GT2 is much more liveable than the GT3 RS. You r incorrect in that the GT2 has only one seat. It is a true 2-seater with a nicely appointed interior. The GT3 RS is meant as a track car, so it has less creature-comforts. Also, it rides more harshly, is louder (although it is a nice sound), & is less stable at high speeds (as in 150mph+). For all intents & purposes, l would prefer the GT2. It is touted as the best Porsche, not just the best 911, ever. It is very good for day-to-day use, given its performance capabilities, & even gets decent fuel economy (16/23 EPA-rated), which is amazing for a car with 530hp.