that question introduces another question. What year sentras are we talking about? If you are comparing new SEs, with old SE-Rs, then the answer is easy. The engine is the same and the body is different. If you are talking about new SEs and new SE-Rs, then read russes review (it is very good). If you are talking about old SEs and old SE-Rs, then the difference is the engine. The SEs had the Ga16de, and the classic SE-Rs had the SR20DE (now in the new SE).
Basically, Nissan just confused the F*ck out of everyone with the switch of model change names and engines. Nissan should have named this current model the SE-R, then the current GXE should be the SE, and the current XE should have been dropped and had the GXE tag. When people ask me what model sentra I have, I tell them SE. Their next question is always: "Dosen't that have a 1.6 litre engine?"
i like the looks of your car chopped i just wish they had a cooiloiver kit out already
Black 2k SE Performance/package
17x7 Konig-Caffeine's ,Stillen front spoiler and pop-cone intake,Aluminum dash kit,Remote starter,35% Tint,Aluminum Pedal Kit,APC Super white headlights and fogs and front and rear turn signals,Ventshade-ventvisors,Custom Front Grille,Stromung cat-back(in the mail)......