Everything has zerk fittings, its heavier duty, the transom mount is beefier and has a tighter and deeper grab on your transom, you can mount your tiller handle on either side without having to flip the engine plate mount and make your angle of force worse/better etc etc...
Plus, it doesn't have a static throttle. With swamp runner, you can get a squeeze lever throttle for $15.00.
The mud skipper style is the old version of SPS/KKK thai longtails. Mud skipper is the KKK version and doesn't have any of the upgrades that swamp runner (sps) does.
Good luck and post up when you get it all dialed in.