We love our Joovy. We bought ours before our trip to WDW in March. It will also be coming with us next month. This is what we experienced. Last time, we eventually rented a stroller down there b/c DS keep falling asleep. There is only 1 strap that goes across the back and he would always hang over the strap. It looked like he was going to fall off of it. He does not like the belt around him. So we took the strap off of the camera and put it below the other one just to make sure he did not fall off. We will still rent DS a single stroller at the parks so he can have shade and a place to sleep if he gets tired or just needs a break. DS loves to stand up on it and look around. He climbs in and off we go. It works really great for trips to the mall and other stores (just not grocery shopping since I buy to much food).
When DD is asleep in her car seat, I can just snap on the attachment for it instead of waking her up. She is 9 months and I still do it when she sleeps. Other wise when she is up I use the tray. I'll attach a toy and she plays with it and looks around.
We looked at getting one from Target (it might be the other one you were talking about). Although the basket was bigger, the seat (does not move like the Joovy) is in the way to take stuff in and out. (if that makes since). I played around with them in the store folding and unfolding them, putting the kids in and pushing it. If I had it to do again I would still get the Joovy. I wanted the all black one, but our Babies R Us only carries the red and black one. Online they have both, but we waited to late to order it. Hope this helps. Congratulations on the baby.