M.P.
Chicco is lighter than Peg when it comes to the car seat, but the ease of a Peg is better than chicco. The Chicco stroller is huge and bulky. It folds just like a Graco, Evenflo, and similar strollers. Peg Pliko P3 (which is what I have) I LOVE IT!! It's super easy to fold and instead of folding flat and wide, if folds narrow and long (if that makes sense)
http://us.pegperego.com/babyproducts-catalog/2010/Pliko+P...
This should help you see what I mean. I actually wanted a Switch Classico where you can either use it as a pram for a younger baby or a traditional stroller for older or even a younger if you feel like it. And with both of those you can use a seat in the stroller. I also know that Chicco doesn't use fabrics that breath well when sweaty and hot. We went out to a swap meet today and his Peg stroller fabric was breathing amazingly. So that's my two cents.