comparing 180sx to a 240

how much body diff is there between a 93 180sx to a same year 240.... can you all please post some links for performace parts for 180 if you all have any by any chance.... also talking in the skyline thread they said that a r33 gts engine is not worth bring in to drop in a 240..... i have a engine and tranny over here that i was planing on bring back......... thanks you all......