I have the Trek Verve1. I won this bike about a year ago. Initially I thought I'd sell it but then thought I'd keep it as a loaner. I took it to Maine last summer to ride around the gravel carriage roads in Acadia park. A lot of these roads can be very hilly but I felt the bike bike performed great. It was very comfortable riding. We did notice most of the rental bikes people were riding were Verve3's. Around town it feels quick and nimble.
I think the 700x45 tires are a good choice for multi surface riding. Gravel,dirt, paved roads I like them.
I did test ride a Roll about a year ago and really liked it. Just not sure about how well it would handle the hills where I ride.
It was a parking lot test. I really like the concept of the Roll though.
Either way both are nice.
I am selling my Verve only because I need the money for another purchase. I would love to keep it.