if its the 7th generation, i know the ZR is heavier than the SX due to the sunroof and other extras, also has 16inch wheels instead of 15inch for the SX. Other than that mechanically its similar, comes with 2zzge and C64 6 speed gearbox. Don't waste your money on auto for this car, the car drives like a bloody slug if u get an auto, it needs a proper close ratio manual gearbox to extract the engine's potential. unless you simply cannot drive manual, then i probably recommend you get a v6 or v8. ;) werd.... NO GO AUTO!~ zr = beter ROFL nah same thing diffrent colour seats, smaller rims, headunit etc. etc. the 2000 and the 2003+ models have diffrent interior and exterior 20003 has black interior, new rear tails and front bar, but yea.. limiter at 8000rpm 2000 has it as 8200 and 2002 has it at 7800 :P