You mean weight/drag related? That's tough to guess i.e. if you take something with roughly the same features and internal volume as an SUV it could be lighter

You mean weight/drag related? That's tough to guess i.e. if you take something with roughly the same features and internal volume as an SUV it could be lighter (not necessarily), it's wheelbase is normally lower which helps but on the other hand some of them don't look very aerodynamic for the rest. Should be possible to make them as safe I guess.