head to head
Neither is simply harder - they are hard in different places. Call of Duty: Black Ops demands more variance; Lethal League demands more reads.

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

Execution · Competitive PvP
A PvP fighter where players smack an accelerating ball at each other until someone dies.
Call of Duty: Black Ops leans Execution (Competitive PvP); Lethal League leans Execution (Competitive PvP).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Call of Duty: Black Ops
Gunfights hinge on aim and reaction speed
Lethal League
Hitting a ball at absurd speeds demands frame-tight timing
Lethal League leans clearly harder on reads.
Call of Duty: Black Ops
Reading human opponents' positioning and timing
Lethal League
Human duels hinge on baiting and predicting swings
Call of Duty: Black Ops leans clearly harder on variance.
Call of Duty: Black Ops
Spawns, care packages, zombies RNG
Lethal League
Ball physics are deterministic
Call of Duty: Black Ops leans clearly harder on optimization.
Call of Duty: Black Ops
Class builds, map control, zombies routing
Lethal League
Small movesets, light character knowledge layer
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.