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

Execution · Practiced Mastery
Careful climbing execution and route planning where a single mistimed grab undoes everything.

Execution · Pure Mechanics
A melee-heavy sci-fi horror game where reactive parry timing and dodge reads dominate over system depth.
Peak leans Execution (Practiced Mastery); The Callisto Protocol leans Execution (Pure Mechanics).
The Callisto Protocol leans a little harder on execution, though the gap is small.
Peak
Stamina-managed grip timing - one slipped input drops the whole climb
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.
Peak
Co-op against a mountain, no adaptive opponent
The Callisto Protocol
Mutants follow telegraphed scripted attack patterns
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Peak
Daily map rotation and item spawns shuffle each ascent
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.
Peak
Routing the wall and rationing items decides summit attempts
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.