I know the Baby Jogger GT is for all terrain, but what difference does this make to the size? (I haven't had a chance to compare them in person yet). Does it make it very much bulkier in the fold? Is it any more cumbersome to push? If I don't get the GT, how would the city mini cope with occasional off road use (talking bumpy tracks, not pushing it across fields).
Mostly this will be used for in town and I want something that folds as small as possible, but it would be good to have the option of being able to take it on non tarmaced surfaces from time to time and don't know if therefore the GT would be better.