Mom of 2 here to a newly walking 1 yr old and an active 3 yr old! I have a graceful mm (shoulder bag comparable to the NF) and a speedy b 30, both in DE- my vote is hands down speedy b 30 just for the fact that you can be hands free and it has a zipper closure to keep things from falling out while on the go. And having it in DE is just one less thing you have to worry about as you go about your busy day. Plus, you already know the speedy b style works for you good luck with your decision, hth!