The Joolz Aer seat is mostly larger, though the tour 2 has a slightly higher canopy. They are very similar sizes though. I have all the side by side comparison details on this review (it's for the Aer+ but the dimensions are the same) www.parentingcentral.com.au/joolz-aer-vs-baby-jogger-city-tour-2-most-popular-travel-strollers/
which has largest seat
The Joolz Aer seat is mostly larger, though the tour 2 has a slightly higher canopy.
They are very similar sizes though.
I have all the side by side comparison details on this review (it's for the Aer+ but the dimensions are the same)
www.parentingcentral.com.au/joolz-aer-vs-baby-jogger-city-tour-2-most-popular-travel-strollers/