There are a LOT of recent bootcamp grads in SF. If you don't have a hookup, getting noticed may be difficult. Not sure about NYC.
Recommendation: until you can afford to be choosy, go where you get the most attention in your career search. If you fight to get a single opportunity in one market, you will likely face a similar challenge when it is time to look for the next job in that same market.
While there are trends, work culture varies from company to company, and I'm sure you'll find a company in either city with a work culture you will be happy with. The more pressing question is which of these two cities do you want to live in?
I've been in SF for 6 years now and before that NYC for 5. things might have changed since then but here's the biggest difference I noticed
NYC a lot of the startups were founded by finance or business people. They saw tech as a some a dozen and not really valued.
In SF on the other hand most startups seem to be founded by tech side and they value tech a more. There is more care for work life balance here then in NYC.