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.

Optimization · Practiced Mastery
A portable Metal Gear pairing mission stealth with a base-building development metagame.

Optimization · Practiced Mastery
Hybrid tower-defense testing maze optimization backed by first-person aim.
Metal Gear Solid: Peace Walker leans Optimization (Practiced Mastery); Sanctum 2 leans Optimization (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Metal Gear Solid: Peace Walker
Boss vehicle fights and CQC chains test aim and timing.
Sanctum 2
Weak-point shooting during waves carries real aim demands
Metal Gear Solid: Peace Walker leans a little harder on reads, though the gap is small.
Metal Gear Solid: Peace Walker
Enemy AI is scripted and predictable.
Sanctum 2
Alien waves path predictably toward the core
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Metal Gear Solid: Peace Walker
Missions are fixed; soldier recruitment adds slight randomness.
Sanctum 2
Wave compositions vary mildly between maps
Metal Gear Solid: Peace Walker leans a little harder on optimization, though the gap is small.
Metal Gear Solid: Peace Walker
Mother Base management and weapon development are pure systems.
Sanctum 2
Maze layouts and tower economics are the solvable heart
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.