I’ve actually been looking into this for the past few months due to the fact that my favorite genre “doesn’t exist” (I’m not joking someone wrote a research paper on this)

I think there are research articles on this if one wants to go into details… Like how certain genres separate. Sometimes there are strict definitions (most techno I think are quite well-defined). But practically I think most ppl tend to enjoy ranges of genres that are close to each other… There are also plenty of genre-blend songs too so there’s that

Also I second for Every Noise At Once, they have some really obscure genres too for detailed comparisons