A lot of the time in diaper art, I don't have a very easy time telling training panties and pull-ups apart from thin diapers. It's nice to see them side-by side for contrast, and I bet this looks amazing in color.
I like how the AB girl has the more "adult" haircut compared to the toddler gal's more childish ponytail, but looking at the details, you notice our toddler seems to be in much better shape than her baby friend, and the way you drew their eyes does make the AB girl look younger and more innocent...I love how the little details on your work just pop like that sometimes!
You don't see as much of adult toddlers and adult little girls around the AB/DL side of the niche, but they are an extant subsection of the age-play part of it, so it's nice to see them show up alongside the babies every now and then. ^^