[Crawford]

I don't feel Boston and SF are really that similar. I mean, yeah, they're white collar, liberal, affluent techie metros, but they have very different vibes. Boston is very overtly white ethnic, tribal, traditional, formal, rigid, SF is none of that.

And the NY-Chicago comparison is kind of a lazy "huge, older American metros with big skylines." They don't feel particularly similar.

Philly-Detroit, I don't see any similarities except both known for urban decay, maybe?

Really the only comparisons I sorta like are Austin-Nashville and St. Louis-Memphis.