Barclays Center is the NBA's newest arena, while Madison Square Garden is probably its most famous. Inevitably, being that the arenas are in the same city, comparisons were bound to arise. Here's a pretty good piece discussing the food, location, and celebrities you're likely to see on site.
It's pretty good.
"Barclays Center, New York's newest entertainment destination and home of the Brooklyn Nets, opened Sept. 21 and started the Battle of New York Arenas. First blood was drawn by Brooklyn native son Jay-Z, who christened Barclays Center with eight sold-out concerts. Across the Brooklyn Bridge is Madison Square Garden, home of the New York Knicks, which has dealt with competition in the past from arenas in New Jersey and Long Island. Like clockwork, the World's Most Famous Arena always comes out on top. New Yorkers and entertainers could change that by choosing Barclays as more worthy of their time and money. Here's a cheat sheet..."