you are reading the scores wrong. it looks close but it is not close. go to zurich and new york and you know what i mean.
so i guess the bronx turned into manhatten, huh? and of course all of new york is clean like singapore.
All big cities have rough areas. And you didn't say anything about cleanliness.
I personally prefer Europe over the US as a place to live, but New York is nowadays a pretty safe city (unless you go to specific problem spots) and if you want to see slums go to Africa or India or South America, not NY.