>>5698596I have Part 5 Chariot (still need to pick up Chariot 2nd myself), so I've got no frame of reference.
He feels very mobile, but the lack of legs/feet is likely a problem to some people. I also find that the round plates of his armor (at the hips) fall off very easily. For general posing purposes, I would assume that Chariot 2nd is preferred.
Regardless, Part 5 Chariot comes with very nice accessories and a sick alt head. So I think he's worth getting, but preferably for ~2000 yen or less.