They had an hour long Clinton film on tv last night. First time I have seen him in action. Generally very impressed he seemed to use all the Pat Parelli games and taught them the same way. They had different names of course Sending Exercise = Squeeze Game, Desensitising = Friendly Game (though Clintons name for it does not convey its purpose which is confidence and reading of human neutral body language not desensitising), Sidepass = Sideways Game.
I did pick up a few idea that I have never seen in Parelli, but felt that he was a little firmer than Pat. He seemed to expect more from the horse on a first attempt at a new exercise. Sideways (I mean Sidepass) went on for ages, where Pat would teach to release at the first "thought" of sideways and then slowly build on it.
Surprised he made a big thing about there being no use for "sideways towards the handler". I use it all the time to mount from a fence or mounting block, getting the horse to come to me, at liberty, rather than lead them into position. The idea is to make them a part of the process. You can tell a lot if your horse suddenly does not sidepass to you to be mounted. They know this is the step before riding, and if they don't want to be ridden it is a gentle way of letting you know. Maybe best to check on the ground as to why before mounting and finding out !
All in all I can see why folks like Clintons' teachings and I suspect that choosing Pat or Clinton is mostly a personal thing not a technical one. Maybe to do with the accent

, though I did get a bit fed up with the number of times he said "OK"

.
I would think that studying both would be the best as both systems seem to be very compatible and one clinician cannot cover the entire topic, its' too big.