head to head
Call of Duty: Black Ops asks more than Street Fighter, and the gap is optimization.

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

Execution · Competitive PvP
Wrestling crude controls to land specials while outguessing a human opponent.
Call of Duty: Black Ops leans Execution (Competitive PvP); Street Fighter leans Execution (Competitive PvP).
Call of Duty: Black Ops leans a little harder on execution, though the gap is small.
Call of Duty: Black Ops
Gunfights hinge on aim and reaction speed
Street Fighter
Notoriously stiff inputs make landing specials the real fight
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
Street Fighter
Human versus rounds still reward bait and punish
Call of Duty: Black Ops leans clearly harder on variance.
Call of Duty: Black Ops
Spawns, care packages, zombies RNG
Street Fighter
Nothing hidden between two visible fighters
Call of Duty: Black Ops leans clearly harder on optimization.
Call of Duty: Black Ops
Class builds, map control, zombies routing
Street Fighter
Tiny moveset leaves little system to solve
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.