Comparing the Tiburon 2.0 Litre 4 to the Celica 1.8 Litre 4. The Tiburon and the Celica are equal at 140 hp, but the Celica has the Lexus made Variable Valve Timing with Intelligence. The GT-S Celica puts out 180 hp
and really isnt any heavier from my experience. It uses the same 1.8 Litre 4 but adds Lift Intelligence to the valve timing. Both models I tested were 5 speed standards, and the celica Gt-S is a 6 speed standard.
I havent gotten to try out the new Tib GT's. These are V6 vehicles, but like hell if you can find any around this hole that I live.
Personally I would choose the 03 (or 04 if you can find it) Tib GT.