Like many, I've owned a Bob Revolution single for 3 years. It's been an excellent stroller, however decided to buy the Summit Double based on a few gripes I had with Bob. In the end, I traded some gripes for other new gripes and not sure I'd do it again.
Bob Revolution Single gripes:
1) Not enough head room
2) Fixed snack tray/carseat adapter - screws in, so not easily removed to change from toddler stroller to baby stroller. Nice to have a simple way to change in the event you're just taking one kid.
Baby Jogger Summit 360 Double gripes:
1) stroller collapses in a way that if you have the carseat adapter installed, it makes for a very awkward shape and quite large. We have a full size SUV and it takes up a lot of room and my wife can barely handle it folded. The Bob collapses like a shell, with the carseat adapter inside the shell.
2) the two front wheels make for better stability, but not as easy to turn/maneuver as the Bob, especially when you have it loaded up.
3) the handlebar angle and placement result in an occasional kick to the rear axle. This problem will only be an issue if you're tall. The Bob handle places you farther away from the stroller.
My wife wants me to sell this and get a Bob, so I may be changing soon. To add, the brake on the Summit is now broken. In Baby Jogger's defense, this may have been caused by our new nanny. Worked fine and now won't hold the stroller. The brake on the Bob seems to be a bit sturdier compared to the Baby Jogger. I will call them to get fixed...
In the end, they're both very well made and compared to my 3yr old Bob, the Baby Jogger is very refined in terms of the quality materials and fit/finish. The gripes above though are significant and very unfortunate for what could be an excellent product.