Originally Posted by
Roth_Trailfinder
For all intents and purposes, every mount is almost exactly the same. The only differences are whether or not it can Fly (which, apparently, will also be whether or not it can Swim), and whether or not its got some special, useless animation.
They all travel at the same speed (there may be some differences between a flying mount in the air vs on the ground, and vs a non-flying mount; but within those groups they all travel at the same speed), so there really isn't anything important to differentiate one flier from another, or one non-flier from another.