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
Stealth systems mastery against scripted guards with moderate execution needs.

Optimization · Practiced Mastery
Open-world survival-flavored tactical shooter built around gear progression and base infiltration.
Metal Gear Solid 3: Subsistence leans Optimization (Practiced Mastery); Tom Clancy's Ghost Recon Breakpoint 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 3: Subsistence
CQC, aiming and timed escapes demand real but moderate precision
Tom Clancy's Ghost Recon Breakpoint
Stealth shooting and drone play reward precise aim
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Metal Gear Solid 3: Subsistence
Guards and bosses run rich but ultimately scripted behaviours
Tom Clancy's Ghost Recon Breakpoint
Drones and soldiers run fixed behaviors, never model you
Tom Clancy's Ghost Recon Breakpoint leans a little harder on variance, though the gap is small.
Metal Gear Solid 3: Subsistence
Patrols and boss quirks are unknown only until studied
Tom Clancy's Ghost Recon Breakpoint
Patrols and gear drops add light randomness
Metal Gear Solid 3: Subsistence leans a little harder on optimization, though the gap is small.
Metal Gear Solid 3: Subsistence
Camo, food and route systems reward deep mastery
Tom Clancy's Ghost Recon Breakpoint
Gear score, builds, and infiltration routes drive success
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.