How do you define Difficulty Tiers?

I mean what does Extreme Diff even mean beyond its face value, Well i have a explanation of each tier that i think makes perfect sense

---------------------------------------------------------

Extreme Diff(100%+ Effort): A fight between 2 complete equals, Were the winner is decided by strategy and skill alone, With them both pushing there limits to new heights. And even by the end the winner might still die to there own injuries(Ex. Mark Vs Conquest, Season 3)

High Diff(90-95% Effort): Near equals, Were the winner was in alot danger of losing the fight as they push it to there limit to take the win(Ex. 15F Sukuna Vs Moharaga)

Mid Diff(50-85% Effort): A fight were you are never really in any danger of losing with a very low chance of losing unless you make MASSIVE mistakes(Ex. Freiza Vs x20 Goku Namek Saga)

Low Diff(20-45% Effort): A fight were at most you'll get scuffed and bruised, Maybe bit bleeding at the absolute most (Ex. Alastor Vs Adam)

No Diff(5-15% Effort): A fight were your chance of wining is 100%, Not to say the fight is instant but you don't even have to try that hard to win(Ex. 15F Sukuna Vs Jogo)

Neg Diff(0-5% Effort): An instant fight, One that at most lasts a few seconds(Ex. Kaidou Vs Luffy, First Fight)