The Superhero Database Classification number, or SHDB Class, is a number that represents the overall 'power' of a character. All traits of a character are used for calculating the Classification.
What it DOESN'T mean
This doesn't mean that a higher class would always beat a lower class character. But the bigger the difference in Class is, the more obvious it is who'll win in a fight.
How is this calculated
( INT^1.3 + (STR*0.5 )^2 + (SPE*0.5)^2 + DUR^1.6 + (POW + (SPS*SPL))^2 + COM^1.8 ) ^ TIER
Super Power Score and Level
Every Super Power has a score (SPS) that is used to calculate the Class. Each Super Power also has 3 levels (SPL). The level is set when connecting that Super Power to a character. The level determines the final score, of the Super Power, being used in the calculation.
Beyonder came into the story as a result from one of Molecule Man's experiments gone wrong, right, he did not exist before that and his appearence was the consequence of a cause which was explained in the story. (= imperfect acausality).
Kinda like also Anti-Monitor came into the DC story - as a consequence of Krona's experiment going wrong, right.
It's not a conincidence both big crosssover stories were written at approximately the same time (Mid-1980s), and have some similar plot ideas.
Beyonder also wasn't omnipotent enough to make a woman he liked fall in love with him, thereafter he was frustrated and threatened to end the multiverse, right.
Probably TOAA seems superior not despite having insufficent feats, but because of having insufficient feats.
The more fictional so-called omnipotents interact with the plot of a story, the more easily they will begin to display obvious limitations, so it's best if they don't do "too" much, if they don't wanna lose their "omnipotent" tag.
The One Above All/Pre retcon Beyonder (both characters were created by legendary comic book writers Jack Kirby and Jim Shooter, Beyonder and OAA are avatars of these two comic book writers. but the other writers ruined and screwed up these characters. as omnipotent deities in their respective realities, the OAA Dominates the Hoi Realm. which is Marvel's highest board. One above all embodie the Writers's comunity who wrote Marvel' reality in its entirety, transcending all hierarchies of Comic Narratives arising from the House of Ideas (OAA Realm) infinite platonic concepts, infinite space-time, and everything else is Insubstantial Fiction to them. OAA's powers are attributed as unlimited; omnipotent, omniscient, omnipresent. The PRB is part of a larger whole called the Beyond Realm, alterantive multi-verse, beyonder verse which is an absolute white void in which beyonder embodies it and contains everything and nothing. that transcends all Concepts of Reality, all of time, space of multiverse. Infinite myriad dimension. beyonder is depicted as the All-powerful lord of Absolute white void. .according to Jim Shooter, Marvel's reality itself is just a drop of water while Beyonder Realm is just an ocean total and vast and that ocean was Beyonder, and Beyonder was everything in that ocean. The powers of the PRB are attributed as unlimited; omnipotent, omniscient, omnipresent. even characters like Doctor Doom, Spider-man were on God Tier using PRB Power. perfoming omniscient and omnipresent feats in One Panel. )
The OAA acts as a monotheistic, god/ Only supreme being of the Marvel Omniverse now. PRB before his retcon. is to Conceptualize the very meaning of the ultimate reality. fundamental power in all reality philosophically as an abstract hypothesis of absolutism
OAA AND PRB are infinite More Powerful Than all DC Comics characters combined. my mind cannot imagine anything more powerful than them.