head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is optimization, and it is a single point.

Execution · Practiced Mastery
Fast aim-and-movement arenas layered over roguelike perk-stacking decisions.

Execution · Practiced Mastery
Wave-based co-op horde shooter.
Crab Champions leans Execution (Practiced Mastery); Killing Floor 2 leans Execution (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Crab Champions
Aimbot plus perfect movement trivialises the fast arena gunplay
Killing Floor 2
Headshot-focused aim and weapon-switching
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Crab Champions
Enemies swarm on fixed behaviours, never modelling you
Killing Floor 2
Scripted zeds, no adaptive opponent
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Crab Champions
Random loot and perk offerings shape every run's power curve
Killing Floor 2
Spawn waves and trader loot vary
Killing Floor 2 leans a little harder on optimization, though the gap is small.
Crab Champions
Stacking synergistic perk builds is the run-winning layer
Killing Floor 2
Perks, weapon synergies, money management
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.