• the color of their shirts is somewhat pointless. not only do they change for the “worker” between boss and leader but leader also uses the color blue twice instead of red. I can understand that the introvert is green but it’s odd that the boss and leader don’t use the same color.
• the yellow “worker” in the leader panel has two hands on the same arm.
• the leader’s mouth is odd and their upper body is “twisted”

All of this doesn’t necessarily mean it’s AI but since each character is unique (and not simply copy-pasted) it would take more time to create them, so these choices have to be deliberately.

I’m also pretty sure it’s this sticker https://www.frogmustardstickers.com/products/horse-denier-sticker