Is a Group Track functionally the same as a Bus?

I specifically use ableton, but I presume this applies across the DAW board. When I read up on technique, treatment of tracks vs busses frequently come up, but for a beginner-ish, is it correct to think of Grouped tracks as a bus (vs using Sends/Returns, for instance). If there is ‘technically’ a difference, is there a clear advantage one way or the other or is it more potato/potAto?