Sorry. You're not the first to tell me that , so it's probably just me (unless I'm manic: then it's all you all ). But most things I wrote are just about why I gave the answers I did.

Yes, it can all be because of BP (because BP can have some SZ or vice versa, which is more likely than ASD). SZ and BP is sometimes very much like ASD.

I don't think both can co-exist. The nature of the two (BP/SZ and ASD) is completely different. Liking music tells you more about that difference.

If it's episodic and delusional, ASD is unlikely. That's all that's important: delusions and do they change. Delusions are difficult to distinguish from the certainty (mostly based on facts, not beliefs, or "beliefs first", and more conventional knowledge). It's really difficult. But it's easier with BP than SZ: there are episodes with different delusions.

The intensity of the beliefs (but also behaviour) is the less tangible thing that can make it rather easy to distinguish between the too, but not every psychiatrist is able to.

I hope that makes more sense.