I won't be reading too much into it, I would hope the creator would have matched aperture settings and all that, but I don't recall him stating that. There are a lot of things that could effect the IQ, but at the end of the day, that's still very nice footage from both machines.
EDIT: Ok, so I actually opened the vid in it's own tab and at 4k, and yes, I can absolutely see the difference. It would still be interesting to know the full settings for each.