way simpler. it's just Redux down to it's core minimum, which is really just an abstraction layer to setting variables.
Redux's core minimum is already pretty incredibly minimal; I have a hard time imagining things much more simple than that.
react-redux, which is neither redux nor the only way to integrate redux with react, is a bit more complicated but still not very complicated.
From my understanding managing state is a fundamentally hard problem, and Redux just make it very explicit and avoid the confusion of a state living in multiple places.
Did not try Vue but is the state management simpler?