The idea that more "cosmopolitan" city is going to have less of a commute is just nonsense. You will just be dealing with trains run on someone else's schedule versus driving yourself. Concentrating yourself into an overpriced sardine can is not necessarily going to positively impact the "time lost" aspect of the job.
Chances are that cutthroat competition from people that love to live in the office will wipe out any direct fiscal advantage of a car free commute.
It's not just about the balance sheet. It's also about the local culture and how well you personally fit into that.