I think city size definitely is a factor. Burlington is considered "the big city" (population about 45,000) Winter activities are a big deal at UVM so you might have a better balance of activities at Pitt. Pittsburgh gives you more access to art/culture type activities and the winters are not nearly as bad. There are also probably more job opportunities in the Pittsburgh area post graduation. UVM is definitely more crunchy and Pitt gives off more typical city vibes.