Well that is a loaded question!! For me they can be better depending on who the person is. Some people just can't give good head. Others are great at it. If you are really in love with someone intercourse can be fantastic. If it's just casual then maybe not. I will have to say if it's just casual, and the person is pretty adept at giving head, then I have a much stronger orgasm....... provided they swallow.
intercourse, nothing like a warm pussy on a cold night and (most of them anyway) they don't have teeth.