Disclaimer: This post is intended to generate discussion. I've made a number of big generalizations, there will be exceptions of course. My comments aren't meant to be interpreted to mean one style of MA is better then another , or to bag UFC fighters or MA etc...
After watching UFC for awhile I've made a few observations.
1) Muay Thai seems to have benefited a LOT from MMA/UFC. Muay Thai fighters are obviously great, but in the UFC it seems the "Muay Trained" fighter just does a whole lot of round kicks. TKD/Kung Fu/Karate all do round kicks. The Muay Thai one is arguably more powerful as you are kicking through the target more, but sacrificing a little speed. Someone who practises TKD for example, should be able to interchange between a more "Muay" round kick and the more snap round kick effortlessly. Yet general UFC followers seem to disregard any other MA styles kicks? (Joe Rogan included). The knees/elbows in UFC rarely seem to be the way Muay Thai teach as well, or used in the same way. If a fighter just trained to do round kicks (any style) and boxing, they would have a good UFC striking game compared to the limited amount of Muay Thai that is used in UFC.
2) UFC fighters seem to telegraph what they are going to go a lot more then other MA's. Watch when a fighter does a spinning kick. Their back kicking leg is often across a lot more to make the kick easier, and they "wind up" before hand more obviously then MA's. Even Lyoto Machida's famous front kick KO is pretty set up, when you compare it to say Anderson Silvias front kick KO. But his opponent was leaning well forward in his stance for a easy target. Most kicking MA styles teach you to be able to kick at pull power from your normal stance without a big telegraph movement first, which slows you down and warns the opponent.
3)Gaurds? Watching the top UFC KO's, how many times could they have prevented it if they had a guard up? Round kicks to side of head, even punches etc. More MA's are taught at the beginning to always have a guard up. All boxers would have their guard up. This happens even when fatigue shouldn't be a factor.
4) UFC fighters seem to lack ruthlessness at times. When the opponent is on the ground, on occasions there seems to be a chance to punch/pound with more intent on finishing him. Submissions pay a larger part, where the traditional MA perhaps would go after the kill more.
5) UFC fighters normally ya LOT stronger/fitter then a typical MA. They are professionals and have really fight experience compared to many MAs. Where their technique might not be as pure or good (examples like off balance in kicks, kick power from strength rather then technique), they make up for it with their physical attributes and fighting experience. They nearly all have a solid to great ground game.
6) Most traditional MA are technically more sound, but lack the strength and fighting experience of a UFC fighter. If they trained to a similar strength and fitness (and some would be anyway), the pure MA should have a more then good chance of winning. When you compare a MA who has studied their art for 10 years + to a typical UFC fighter, the UFC fighter looks a lot less fluid in movements and technique, and leaves a lot more openings for the opponent.
There are however the top UFC fighters in more divisions who are a cut above the rest of the UFC, and are excluded from some of these generalizations...
Thoughts and comments