Toned body - which is better? (Patreon)

Hi all,

These are some examples for the Toned body-type from an artist I'm currently in discussions with about possible paper-doll characters for Newlife.

I haven't seriously prototyped this so I don't know if I'll end up putting it into the game itself but I've decided to commission a base set of images to try it out with.

Anyway, these are 4 examples of the toned body-type - the main variation is around the stomach. What do you think? Which is best?