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
Strategic dismemberment under resource pressure, solved by upgrade planning and practiced limb-aiming.

Optimization · Practiced Mastery
Threading precise inputs through scripted guard gauntlets aboard a controlled and memorisable facility.
Dead Space (2008) leans Execution (Practiced Mastery); Metal Gear Solid 2: Sons of Liberty leans Optimization (Practiced Mastery).
Dead Space (2008) leans a little harder on execution, though the gap is small.
Dead Space (2008)
Precise limb-targeting under Necromorph pressure is the core skill
Metal Gear Solid 2: Sons of Liberty
First-person aim and guard reaction windows demand precise input
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Dead Space (2008)
Necromorphs follow fixed approach patterns, not player modelling
Metal Gear Solid 2: Sons of Liberty
Guards radio for backup on scripted triggers, not adaptive tactics
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Dead Space (2008)
Store stock is deterministic; minor drop variance on kills
Metal Gear Solid 2: Sons of Liberty
Alert timers and item pickups create some hidden-state tension
Metal Gear Solid 2: Sons of Liberty leans a little harder on optimization, though the gap is small.
Dead Space (2008)
Weapon upgrading, power-node routing and stasis timing are optimisable
Metal Gear Solid 2: Sons of Liberty
Chokepoint memorisation and radar manipulation are learnable and repeatable
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.