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.
The Deep is easily stronger. He can knock out criminals effortlessly, punch holes through normal humans, was able to get the upper hand on Starlight before A-Train interrupted, although sure she wasn't using her powers but it's still impressive as Starlight is able to tank hits from Black Noir even without any use of her powers, and also effortlessly break stone walls, and even able to land hits on him (And Noir dodged a blow from Homelander in The Boys Diabolical and stated by Mother's Milk to be able to outrun a car). The Deep has also been able to ram A-Train through a wall and took a punch from him in the gills and multiple punches in Season 4.
On top of that The Deep is bulletproof so Chris' weapons won't be too effective. (I'm not calling this is one-sided fight, it's not. But Deep should win this)