For me fan's give a more pressured wash, cover a larger area and use far less water.
They are funny to get used to but the benefits are worth it, i would say that you do have to be careful within gardiners ceramic ones as they can break when hit agains't door handles or inside the channels of sash window frames.
Other than that great up grade and shaves a tiny bit more weight as they are diddy compared to the Vikan style metal ones.
By far one of the best brushes available, mines about two to three months old and is showing no wear...