Mamizou? I can't seem to see the difference except for the chest size.

would likelt not have been tagged unless there was reason to do so due to piciv or whatever. Perhaps one is her?
(likely the busty one, since Treeshi is known to be as flat as a board.

Artist commentary (via Google Translate):
Mamizou is a variation of one, Which would be a real angel?

Tag added.