Aside from profile (how much headroom it takes up) and ease of control, the design aesthetics are the biggest difference I can see from one ceiling fan to the next, and that's a matter of personal taste.
At one point I was shopping for a ceiling fan that doubled as a space heater, but it would've required a reinforced ceiling brace and a bigger electrical connection, so I gave up on that. Cool idea though.
As an aside though,
@Momoko77, normally moving house you wouldn't take hardwired fixtures with you. Especially if you don't like it, leave the fan for the next resident to deal with.