To answer questions no one asked.
AF Early, OS End and OS Master Control are on the same ballpark for different reasons, OS End has nearly double the alien count than the other two and has Way Big...but he still has the time limit, the recharge time and mistranformations, OS Master Control basically runs circles around them with his combos, no mistransformations and no time limit but he's still operating with just 11 aliens (since he lost Ghostfreak) and none of his aliens can do shit to Way Big, meanwhile AF Early doesn't mistrasnform and can quick change but still operates within a time limit that gets shorter the more he quick changes and is basically operating with 9 aliens since Alien X is basically useless to him.
11 Year Old Ben is basically OS End on crack:Has 1 or 2 more aliens, has a time limit but no recharge time, consistently gets the alien he wants, better control over his aliens and Way Big, 11 Year Old End is the better fighter since he doesn't have Feedback anymore to obsess over and got used to his other forms again, but he's below Early because Feedback is a such a good alien the obsession is worth it.
When one era of the characters end or starts is sorta fuzzy and it's just the general idea:OS Early is Season 1 of classic, Master Control is basically Back With a Vengeance, OS End is basically Season 3 to Destroy All Alien right before he got Feedback and Arctiguana, AF Early is basically Season 1 to right before Highbreed war, AF End is Season 3, UA Early is up to the end of the Ultimate Kevin Arc, UA Mid is fuzzy but it's when Ultimate Ben unlocks everything he transformed before plus extras, UA End is Dragon War, OV Early is the first Two Seasons of OV, OV Mid is fuzzy and OV End is the final two seasons of Omniverse.