i like celicas front while i like rsx tail lights more. the shifting on an rsx is easier.
take into consideration the model year. celica will change its model in less than a year, so if you buy it now, ull look a little old to others. im not saying anything bad, but ppl looking from outside maybe wont know that its brand new 04! i personally dont care about that, but maybe you do. rsx has 2 more years to go. consider that there are gonna be more rsx on the streets in the near future, even way more than celica. another thing is that you can find a lot of gt everywhere, but there arent a lot of gts, so ull be an exception getting a gts if you want to. overall, i would select a celica over an rsx. celica is the first and best sports car with the crazy looks.
as for performance, celica should have a better handling, faster launch(IMO) and slower end(IMO).
Here are some important performance specs i did:
180 hp 200hp
2500 lbs 2767 lbs
After calculations this is what you get
I calculated so i can find how many pounds each HP carries on each of the car.
GTS: 13.90 lbs/hp (13.8888 to be exact)
RSX-S: 13.85 lbs/hp (13.835 to be exact)
The difference is 0.05 pounds per hp.
To equal GTS lbs/hp to RSX-S, you need 9.70lbs reduction on ur GTS, which will total out to 2490.30lbs
If you want to equal them out with hp, then you should have your GTS hp to 184.5!
This calculation is only related to hp and weights, other stuffs might make differences like torque and all that. Hopefully the stats help you out (someone has done this b4 in a post, but with a lil different weights)
If sPeEd4tHeNeEd's whp comment true, than DAMMMN!
Most people do hp/lbs, but whatever. According to your calculations, yes, you would need those specific changes to equal the cars out. But you have to realize that those horsepower numbers are taken at the flywheel and not the wheels, so sPeEd4tHeNeEd calculations are a little more accurate except that GTS's dyno for the most part in the low 150's not low 160's.
But you could boggle your mind over this math all day, but it's still a drivers race stock wise. All engines put out different numbers, many drivers differ in weight obviously, and so many other factors come into play such as aerodynamics, gear ratios, torque, etc.
With RSX's you get more horsepower per dollar and they can be modded to be faster than a GTS, but only after thousands of dollars which I'm sure a lot of people aren't willing to spend. I'm gonna tell you to get a GTS because I have one and a lot of other people on this site are going to do the same because the name of the site is EverythingCelica.
The deciding factor in buying a car should absoultely not be based on speed alone. If you want more speed for your money, go buy a Mustang or something. You should do a lot more research by yourself on reliability, warranties, bang for your buck, the list goes on. Your mind should be open when buying a car, and no one here will bring forth enough decent evidence for you to make up your mind unless your parents are buying this car for you and you have to pay absolutely nothing yourself. Go to Edmunds.com or some other consumer review site, and see what people have to say about the mechanically or whatever. Doing what someone tells you to do on a Celica website would make no sense because no one really cares about your situation to tell you which car would be best for you. Only you can decide this, and my advice to you would be to gather info on both of the cars, test drive them, and then make an educated decision, because I'm sure that you havn't done all of those yet. Then come back here and ask us specific questions about different issues with the Celicas or go to an RSX site and do the same.
I'm not flaming you or anything, I just don't think it's fair to you to have us make up your mind for you. Buy a car you love inside and out, and don't listen or care about what anyone else thinks.