Not in the same league as (someone or something) phrase
To be not equal to someone or something in quality, ability, skill, etc.
When it comes to playing football, I'm not in the same league as John.
His later work was not in the same league as his early work.
As for boxing, he is not in the same league as me! I'm unmatched by any other boxers in this century!
The origin of this phrase is not clear.
This phrase is used to describe something very modern or updated or something that no longer looks like what it's used to.
It has been a long time since I left my high school, and now I have to admit that it's certainly not your father's high school anymore.