Hehe yeah, I mean, I am not 100% sure myself, which is why I asked.

There's no real difference between a 1-tuple struct and the regular struct, other than the name. So to me, it feels like either are both newtypes. But, I guess I could see some sort of argument the other way too.

In Haskell, a newtype can be a single-field record with a named field, so from a Haskell perspective, I would definitely consider both of them “newtypes.”