head to head
Payday 2 asks more than Metal Gear Solid 2: Sons of Liberty, and the gap is variance.

Optimization · Practiced Mastery
Threading precise inputs through scripted guard gauntlets aboard a controlled and memorisable facility.

Execution · Practiced Mastery
Loot-driven co-op heist shooter where builds and route knowledge make perfect crimes.
Metal Gear Solid 2: Sons of Liberty leans Optimization (Practiced Mastery); Payday 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.
Metal Gear Solid 2: Sons of Liberty
First-person aim and guard reaction windows demand precise input
Payday 2
Sustained gunfights and stealth execution under pressure
Metal Gear Solid 2: Sons of Liberty leans a little harder on reads, though the gap is small.
Metal Gear Solid 2: Sons of Liberty
Guards radio for backup on scripted triggers, not adaptive tactics
Payday 2
Cops and guards follow spawn scripts
Payday 2 leans clearly harder on variance.
Metal Gear Solid 2: Sons of Liberty
Alert timers and item pickups create some hidden-state tension
Payday 2
Random vault locations, guard patrols, and escrow rolls
Metal Gear Solid 2: Sons of Liberty leans a little harder on optimization, though the gap is small.
Metal Gear Solid 2: Sons of Liberty
Chokepoint memorisation and radar manipulation are learnable and repeatable
Payday 2
Skill builds and stealth route planning per heist
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.