It’s a different proposition to a tandem pushchair. Both children are able to see the world and can even turn and play or babble with each other. If you get a Phil and Teds, one child is behind and has a very restricted view of whats going on.
Seats Recline Separately
Another great point is that the seats recline independently of one another. So if one baby is feeling tired you can just lie that side down. There is also an extendable leg rest which makes things even more comfy.
A good link for the Maclaren Twin Techno can