Cost of living comparative

Hi everyone! Waiting for answers from masters programs, and thinking about having a comparative of the cost of living in the different cities I applied for. Including rent on-campus and off-campus, cost of transportations, and in general the prices per person per month.

I’ve made research and a room in Cambridge would be approx 1.300, compared to a studio near UPenn for 900. Is this accurate?

I’m not living in the US. So just trying to understand the panorama.