Is it that case in terms of culture, philosophy/values, architecture, demographics (age, gender, ethnicity, marriage status, etc), economy? In my opinion: no.
Also happens to be one of the most geographically distant cities to Europe.
What do you think the people who lived there in the 60s say about your assessment of 2005 SF being "very Bohemian with a strong underground scene"?
It's always worse than it was but people think it was still good when they got there but got much worse shortly thereafter.
Pre 2005 - "general impression it was very Bohemian with a strong underground scene" 2005-2010 - "the city had a very positive vibe" Post 2010 - "overcrowded, overvalued and overcapitalized" "a capitalist parody of this former self"
My guess is that you likely moved to SF around 2005 and the city fortunately managed to maintain its "very positive vibe." Yet someone who moved there in the mid 80s would likely have a very different opinion of the same era. Similarly some tech bro who moved there in 2010 would likely have a more rose-colored take on the 2010-2018 era.
I guess my substantive point is that people like to think they were there when it was good no matter when they were there.
New York?
NY feels more real - as in London, Berlin or Paris, someone will tell you if something's shit. NY also obviously has a comparable arts scene. Apparently there's a SF Fashion Week but it's sure isn't in international calendars. People from NY seem to have travelled more than people from SF too.
Maybe SF is more like, say, one of the Spanish cities in terms of being relaxed?
I'd also like to throw New Orleans into the mix, and agree with Montreal as well even though it is in Canada. I'd really like to see Vancouver but have never been.
So in one way I think NYC because you can find cross sections of the cultures of many European cities there, but maybe SF more relaxed way of life is more similar to some. I however do not find the people of Lisbon where I am now (rapidly becoming a very multicultural center as more people move for the cheap prices and beautiful weather) to be quite so relaxed as the people of California (as awesome and friendly as they are), however I've only been to California a few times and never for any extended period of time and have only been in Lisbon a week and a half and NYC for ~5 years.
So I guess what I'm saying is... what do I know? I guess maybe Boston's another good city from the comments, beautiful, nicely paced, definitely didn't notice any feces or needles last time I was there.
Maybe it's P = NP problem. Some google searching places New Orleans at the top of 21 followed by Venice Beach, CA. Then there's a list of seven dominated by smaller cities (towns?) with the big one I've heard of being Kansas City. Never been there, would never have thought of it. I have however read about Peoria (sp?) Iowa which does indeed sound quite European. And of course Quebec City comes up which is a great choice.
It probably really depends (for both continents) where you've been, what you've done, when you've done it, and on and on.
So we get nowhere, eh?