head to head
Call of Duty: Black Ops asks more than One Piece: Burning Blood, and the gap is execution.

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

Execution · Competitive PvP
An anime arena fighter testing team-switch timing and counter prediction against humans.
Call of Duty: Black Ops leans Execution (Competitive PvP); One Piece: Burning Blood 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
One Piece: Burning Blood
Combo timing and guard breaks need moderate hands
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
One Piece: Burning Blood
Human opponents bait switches and counters constantly
Call of Duty: Black Ops leans clearly harder on variance.
Call of Duty: Black Ops
Spawns, care packages, zombies RNG
One Piece: Burning Blood
Full-information arena with no hidden state
Call of Duty: Black Ops leans a little harder on optimization, though the gap is small.
Call of Duty: Black Ops
Class builds, map control, zombies routing
One Piece: Burning Blood
Team composition and Devil Fruit matchups reward study
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.