When he started snapping to change things I was like oh, okay, I see what this is. I think Trelane did that too, but it became such a trademark of Q that it was hard to ignore the similarity. And then the voice was just delicious icing on the cake. They didn’t make a big deal of it or make some weird tortured commentary to try and tie it into continuity. They just let it be as a story on its own.

Unofficially in Beta canon: yes.

Alpha canon: maybe? They haven’t so much as confirmed that Trelane is a Q.