rb20 - less compression, less power, less torque, more boost, more rpm. However in a lighter car... so its very similar performance except the r32 will handle slightly better.
Brakes is similar as r33 brakes are better but have more weight to stop again..
Do remember r33 parts will be newer than r32 parts aswell, so be wary of anythin on the r32 that hasnt been looked after/changed! Go the 32 all tha way!! Mind u rb25 is a better engine, so mix to two as said b4 and ull have a killa car