Steve
Mostly Harmless
Technically untrue.
The Chinese word "xing" in Mandarin or "jing" in Cantonese or Japanese "kun", "kata", simply means "pattern" or "shape".
If you can name a single system that doesn't teach some sort of pattern or model, well, then it's not a system. They all do. MMA is a system of kata, as much as Shaolinquan.
Getting a little pedantic here. So, for the sake of clear communication, you are saying that, in the context of this discussion, this pattern or model:
I can see a lot of functional differences. Can't you?