There is no difference. They are just split into two categories. MLB does this so AL can play NL in the regular season and the post season.
National league and American league
eight teams. four in AL and four in NL
The Cubs (NL) & White Sox (AL)
there not teams and YES they are in every mlb baseball game
Two teams have switched leagues. The Milwaukee Brewers changed from the AL to the NL in 1998 and the Houston Astros moved to the AL in 2013.
They are in the same time zone, so there is no time difference between them.
burj khalife is real al burj is a concept
AA is for alcoholics, Al-anon is for the families of alcoholics.
There is no difference between: Jugar al beisból and jugar el beisból. It depends on the country, but both forms are used.
NL All-stars and AL All-stars