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

Optimization · Practiced Mastery
Series finale blending stealth with active battlefields and heavy cinematics.

Optimization · Practiced Mastery
The sequel takes Torque to Baltimore to fight slavery-themed monsters while his morality shapes the story.
Metal Gear Solid 4: Guns of the Patriots leans Optimization (Practiced Mastery); The Suffering: Ties That Bind 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 4: Guns of the Patriots
flexible gunplay alongside sneaking
The Suffering: Ties That Bind
Gunplay and monster-form brawling demand decent reflexes
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Metal Gear Solid 4: Guns of the Patriots
battlefield factions act on scripts
The Suffering: Ties That Bind
Enemy archetypes run scripted behaviour, never adapt
The Suffering: Ties That Bind leans a little harder on variance, though the gap is small.
Metal Gear Solid 4: Guns of the Patriots
mid-battle chaos mostly cosmetic
The Suffering: Ties That Bind
Unknown encounters and branching morality first time
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Metal Gear Solid 4: Guns of the Patriots
camo, gear, and route knowledge per act
The Suffering: Ties That Bind
Combat systems and morality routes converge with knowledge
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.
full breakdown
Metal Gear Solid 4: Guns of the Patriots →
full breakdown
The Suffering: Ties That Bind →