With a rear-mounted child seat, I recommend going with the easiest mount/dismount option, which would be the Verve. You don't want to be tipping the bike to get on and off, as it will already be imbalanced with your child's weight over the rear wheel. They both have rack mounts, so you shouldn't have any problem mounting a seat. With the Verve, you're going to need an adapter bar to put it on the bike rack, like this:
https://www.amazon.com/Allen-Sports-.../dp/B000ELSSZE