|We transitioned just fine... in fact, we transitioned early because our family does THUNDER thighs... LOL! So we outgrew our smalls early when they started leaving red marks. The rise on the large is a little generous for a 6 month old, but not awful. And since I'm CD'ing DC 2 I've gotten good about buying CD friendly clothes.
However, I can see that if your child's build is different, there could be an akward stage between the two.
This isn't an excuse, but I have noticed that Mother Ease is strongly commited to making cloth diapering an economical choice. It's so easy to spend thousands on cloth if you get into all the fashionable and trendy diapers, or have to buy a new stash for multiple sizes. I think part of their goal was to try and help you limit the amount you would have to spend.