GUE Fundamentals, I am coming up on 300 dives, have done rescue, and am a new Instructor. I have to say the Fundies made me feel like I was a poser and should sell all my gear lol but not going to happen because I passed. It was very challenging and made me a much better and much more aware diver. Which now I can pass on to those that I teach and dive with. Great experience.
Before that Cavern, learn a ton but think I was to new a diver and should have waited. Had a great instructor now I think I would have much more fun doing it.
So to recap: at close to 300 dives, you have done all the certs through rescue and Instructor, and even Cavern - through PADI, SSI, and IANTD (according to your profile). THEN you did GUE Fundamentals of Recreational Diving, and acknowledge that this BASIC skills class made you "much better and much more aware," than any other class, and was in fact the best class you have ever taken. WOW!
But now you want to take what you learned in GUE brand training, and pass it off as whatever brand you are an instructor for - even though your instructor brand's training was so poor that they failed to train you with these basic skills. WOW!
You discovered one brand that has gone to great lengths to differentiate themselves and compete in a very competitive market. So IMHO, giving superior credit to the agency that failed you is misleading to your students, and is unethical professionally.
Many divers on here go to great lengths to claim that training brand doesn't matter. But you compared four agencies and discovered there is a difference. Instead of promoting brands that failed you, why not become an instructor for and promote the brand that actually made you "much better and much more aware" and gave you your best training experience?