The difference is that you don't need training here; The decision graphs can be built on the fly by an LLM and contain instructions in plain language.

The magic moment for me from the Jev release was not that there was some system playing doom: Rather it was the moment, they just changed a part of the prompt to "don't shoot, just dodge" and the behavior changed immediately.

This means you can have a system with fast decision-making but still interact with it via language.