@TeWaio you'll have fun. I saw a similar matchup a few days ago Bulls v Rockets in Chicago. It was a bloody good crowd (near sellout) considering the Bulls are fairly terrible team this year. I understand MSG always sells out - especially for the cross town game.
There'll be a heap going on around the stadium and during the game even if the score blows out (which it did for Bulls Rockets). Some of it is fairly cheesy very American but plenty to keep you entertained.