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

Execution · Pure Mechanics
A relentless wave-clearing shooter that tests sustained aim and movement against massive scripted enemy crowds.

Execution · Pure Mechanics
A melee-heavy sci-fi horror game where reactive parry timing and dodge reads dominate over system depth.
Painkiller (2004) leans Execution (Pure Mechanics); The Callisto Protocol leans Execution (Pure Mechanics).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Painkiller (2004)
Constant crowd-control movement against overwhelming enemy counts demands fast aim
The Callisto Protocol
Melee-parry timing and dodge-direction choices are the core skill
The Callisto Protocol leans a little harder on reads, though the gap is small.
Painkiller (2004)
All enemies are scripted waves with fixed attack patterns
The Callisto Protocol
Mutants follow telegraphed scripted attack patterns
The Callisto Protocol leans a little harder on variance, though the gap is small.
Painkiller (2004)
Enemy counts and placements are fixed with minimal unknown elements
The Callisto Protocol
Some loot containers and drop variability add mild uncertainty
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Painkiller (2004)
Tarot card selection and level routing provide a thin solvable layer
The Callisto Protocol
Weapon upgrades and credit management have limited depth
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.