I think the magenta one doesn't read well because it's got a black face that blends into the dark background, both in the portrait and in-game. In the big portrait, the glowing shadow also blends in with the head.
The pink cloud looks so good in the portrait (and in-game as well!), it makes me want to see more of it in-game. If it wasn't off-theme for a ninja, I'd go as far as recommending a permanent smoke halo around the character so that their head stops blending into the background.