Im going to assume you mean Bluedog and answer your question.
We met with bluedog several times over the course of a few years. We met with Rich once for appx 90 minutes. Bluedog wants all of the weight to start back in the stance and then shift to the middle...Obviously Rich wants weighted rear leg. Bluedog teaches movement with the arms and an active front hip...Rich teaches no arms and an active rear hip/leg. Bluedog is big on the sequence...He has a sequence he teaches...he always says the sequence is timing and the timing is sequence. The sequence is pretty difficult in my opinion to fine tune with him since he lives so far away...so if something breaks down...it's hard to fix..One thing I really like about bluedog's teaching is he really preaches hitting the ball hard...like over the fence. Hes big on pulling the ball. He would get colby hitting the ball hard...it was just a longer swing with all of the arm movement, etc. I will say I consider bluedog a friend. He wont like me saying this, but he wouldnt take a penny from me and he came to my town a couple times and paid his own expenses...we went down there once as well....and we dont live close to each other at all....he is not a fan of marketers of baseball swings. He is a really good teacher, whether you like his stuff or not, he finds ways to teach his material when the student is struggling to learn a certain aspect of the swing. Rich has a structured swing...ie an exact way to do things...how to coil, how to snap the barrel and rear hip, etc. I like the suddenness of it. Do I agree with all of it? Maybe not, but I do agree with the concepts and see a lot of it in major league hitters. I agree that the swing path should not be around the spinal axis (like a merry go round)..I also agree with the reactive front leg, ie it catches the swing like a kickstand on a bike....(just my opinion)
These are just my thoughts....I think both hitting instructors have lots of good to offer their students...both are very nice men in person and both are very "cranky" behind the keyboard. Colby's swing contains elements of both of their teachings and approaches...Is there one exact correct way to hit? Id say no....but Id say professional hitters that are successful all have similar absolutes of the swing...the difficult part is interpreting what those are..and that is why there is an internet hitting war out there, in my opinion...
(If anyone has specific questions about what either teach, feel free to PM me)