Skin stealers: they have the same speed when you walk, when you're closer to a skin stealer, your skin will shake
Partygoers: they dont have an exact walkspeed, but they can teleport to a player every 5 seconds.
Facelings: they are very slow, you can easily run away from them
Hounds: they have the same speed when you run, so it's pretty hard to run away from them
Clumps and Crawlings: clumps walk on the ceiling and are pretty slow, homever crawlings are pretty fast and can walk on the ceiling or in the floor