New York City is often seen as a holy grail, "make it or break it" city, which is true, but to some, it can be seen in a totally different way. Being from Boston, MA I grew up with listening to Boston College's band practicing in the evening, experiencing Fenway Park, Gillette Stadium, and TD Garden traffic which is just normal traffic now, and having pride in calling myself a Bostonian. Now being a Bostonian in New York City isn't always the easiest (hello it's enemy territory!), but regardless of the sport rivalry, there are many differences between the two that surface every now and then. So here we go!
1. "Wicked" vs. "Mad"
Being in New York, the language is completely different. Yes, they are both English, but when a New Yorker hears a Bostonian use the term "wicked", such as, its wicked cold, that's wicked etc., they are always pointing it out regardless of how many times they have heard you say it. If they haven't heard it before they usually don't understand the concept of how to use it, but hearing them use "mad", ie. you're being mad annoying, is exactly the same as using wicked. 
2. City
While New York City is referred to as the concrete jungle, with only have central park as the only vegetation for miles, NYC can seem to be a bit stuffy at times. Coming from a city that is open, lots of little islands of trees and grass, having the public gardens, Boston Commons, and not as many sky scrappers, leaving the historical old fashion building to bring character and identity to this town.
3. Tours
The site seeing tours, called duck boats or duck tours, can go in the water. Yup water and land, which our sports team ride on when they have won a championship. Don't think NYC has anything similar to a duo tour.
4. Pride
Although we have a common pride for the city we live in, Bostonians have a sense of ownership being called a Bostonian. Even if other cities call us Mass-holes, we still take ownership of it, though one might consider it to be an insult. New Yorkers are only called new yorkers, and yes, I Wikipedia'd that!
5. Weather
In Boston, the weather is dramatically different than in New York. The winters are colder and snowier, the summers aren't as hot and humid as New York, but one thing that is the same is the unreliable weather reports saying it'll be 30 degrees out when in reality it's 60, hot, and sunny.
6. Days Off
Going to school in Boston we have certain times of the year where the school is closed while other schools are open. To name a few Marathon Monday, Patriots Day, Columbus Day, whenever a sports team parade is taking place, Memorial Day, and so on. The best part of any of the day fall on a Sunday, that Monday no school! While here in New York, last year I had class on Columbus Day, Patriots Day, and Presidents Day, yay!
If you really want to get technical about Boston and New York, Boston was founded before New York was, showing the difference between the two yet again!
