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.
TOAA is Marvel and the Presence/Elaine Belloc is DC, but there's a quote by Jim Shooter and Stan Lee from Marvel that puts The Pre-Retcon Beyonder more higher--even above TOAA, (including Elaine Belloc AKA the Presence 2.0) and that's “being millions and millions of times more powerful than Marvel." That statement alone future protects Beyonder from the debate on who is bigger than the two. Beyonder is also TOAA of his realm and came to Marvel to be it's classical TOAA. He was Marvels first TOAA technically, previously going by the name of The One Who Is All. But make no mistake both have suffered defeat or retcon one way or another. TOAA's weakest Avatar was defeated and absorbed by a version of Thanos in his Astral Regulator form while the Beyonder was retconned for being too powerful. Today's TOAA was taken from the Beyonder blueprint, since TOAA is arguably and "supposedly more powerful than the Presence". I know I kinda got off topic, but this was a point to just prove that the beyonder is more powerful and beats Multi-Oblivion (True-Form)