NL or American League is one of the professional baseball leagues in the United States. It was created in 1876, and that makes it to be the first professional league for baseball in the United States. AL or American League, on the other hand, was created in 1901, and that makes it to be the newer league of the two. One of the reasons behind the creation of AL is for both to be competing with each other.
For AL, the total number of teams that participate in the American league is 14, whereas it is 16 for the National League. Another major difference is that there is provision for a single hitter in the American league, whereas anybody can bat in the National League. This is known as a Designated hitter in the American League. Another difference is that NL focuses mostly on offensive runs, placing, and pitching, whereas AL focuses more on power and home runs.