Just because it's JDM doesn't exclude it from being rice. There are better cars out there than each of those in their respective price ranges.

RSX type S price range = WRX, Mazda 6
Celica GT-S price range = Mazda 3, SRT-4 (even though I hate them and they are pieces of shit that will fall apart in a year, but good bang for the buck)

But if held by gunpoint to drive either an RSX or the Celica, I'd drive the RSX. Better fit, finish, performance, and looks all around.