For the enterable interiors part, it behaves badly on SAMP. Get in one, go for about 1 football field length in any direction, then you pop out and get hurt. So yes, Enterable interiors for any vehicle is deadly in SA:MP. The Main cause of this is lag. So I advise not to go in them in MP, but in them in SP.
:ps: Also, vehicles with enterable interiors aren't (bullet, fire, explosion)-proof and in some areas, they can get in some "odd" situations. Such as: stuck on guardrail and it can't move, and other things that match up with that.