Have you ever received DMs from two different people, but you swear it's one person?

I swear this "new person" who started messaging me recently is actually just a new persona of someone who's been messaging me. I don't really understand it. I can tell by things like the writing style and some of the references to the same subjects (it's also telling that the old account has gone silent recently). I can tell they're trying to make it seem like they're a different person, but I'm seeing through it...

They're not posting photos of themselves or "catfishing" in the traditional sense (this is just a friend, not anything romantic or sexual). But it's just bizarre to me. Almost like he got bored of his old persona and wants to be someone new?

Anyone else experienced something like this?