I have the uppababy vista 2015 and love it, although it has its limitations
Big, sturdy pushchair. versatile, HUGE basket, dream to push. MASSIVE sun canopy, parent facing and fab to push. Two big boys and it copes brilliantly with them. Adjustable for my tall husband. Can clip on the car seat and the carrycot can be used for overnight sleeping
I used it as a single, double and with a board. In fact used it for 3 with the double and the board! Certainly grows with your family.
Because it is a double it is wide, about 3cm wider (I'm guessing!) than a standard double. You used to this though.
It is not a compact fold, but interestingly goes in the boot of my Q5 with much more ease than a bugaboo cameleon. IMO such a better pushchair all round when compared with the cameleon, but that's another thread!
Would certainly buy it again and again, but it has its limitations, so choose carefully!
Can't help with your other choice. Sorry.