yo yo competition classes

what is the differences in all the classes of yo-yo 1a,2a,3a,and 4a?

do you mean like what’s the difference in styles?
because 1a is just one sleeping yoyo where you do string tricks
2a is 2 looping yoyos
3a is 2 sleeping yoyos
4a is where the yoyo isn’t connected to the string at all, and you do a lot of whips and what not
5a is counterweight, where the string isn’t connected to your finger at all, so you can throw the counterweight around
and AP is artistic performance, where you do uhh… just that. an artisist performance. lol