head to head
SWAT 4 asks more than Metal Gear Solid 2: Substance, and the gap is variance.

Optimization · Practiced Mastery
A stealth-action game where planning routes past scripted guards is the deep skill.

Optimization · Practiced Mastery
A tactical police shooter where careful, methodical tactics against randomized threats defines mastery.
Metal Gear Solid 2: Substance leans Optimization (Practiced Mastery); SWAT 4 leans Optimization (Practiced Mastery).
SWAT 4 leans a little harder on execution, though the gap is small.
Metal Gear Solid 2: Substance
stealth timing and aim matter
SWAT 4
precise aim and careful movement required
SWAT 4 leans a little harder on reads, though the gap is small.
Metal Gear Solid 2: Substance
guards are scripted, no adaptation
SWAT 4
suspects react but don't truly adapt
SWAT 4 leans clearly harder on variance.
Metal Gear Solid 2: Substance
minor patrol randomness
SWAT 4
suspect placement and behavior randomized
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Metal Gear Solid 2: Substance
stealth routes and gadgets solvable
SWAT 4
tactics and equipment loadouts solvable
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.