That is actually a bit confusing and I see a lot of people not realizing.
I was playing along, and suddenly thought, "Hey hang on, I picked AVN, why am I playing open world." Maybe a screen in-game, or something to say, you are now being switched would be helpful, or a warning that VN only lasts for a while before you're switched. (
Megalono). Not complaining by any means, just a suggestion. By the time it switched, I had a good understanding of how it all worked anyway and Dev clearly made it totally seamless (hence, my not even noticing). But I've seen so many people say, that they are playing the VN version.