head to head
Call of Duty: Black Ops asks more than NBA 2K20, and the gap is execution.

Execution · Competitive PvP
Cold War-era shooter pairing twitch multiplayer with the cult Zombies mode.

Execution · Competitive PvP
Tests shot-stick timing and badge-build optimization against human defenders.
Call of Duty: Black Ops leans Execution (Competitive PvP); NBA 2K20 leans Execution (Competitive PvP).
Call of Duty: Black Ops leans clearly harder on execution.
Call of Duty: Black Ops
Gunfights hinge on aim and reaction speed
NBA 2K20
Shot timing and dribble combos require practiced stick work
Call of Duty: Black Ops leans a little harder on reads, though the gap is small.
Call of Duty: Black Ops
Reading human opponents' positioning and timing
NBA 2K20
Outguessing human defenders and callers decides online possessions
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Call of Duty: Black Ops
Spawns, care packages, zombies RNG
NBA 2K20
Shot RNG and rebounds swing tight games
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Call of Duty: Black Ops
Class builds, map control, zombies routing
NBA 2K20
Builds, badges and playbook knowledge dominate MyCareer and online
A matching score does not mean a matching test. Two games can both sit at 10 on execution and demand completely different things of you - which is why the reasoning above matters more than the number beside it.