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
Tests solving suppress-and-flank squad puzzles more than raw shooting.

Optimization · Pure Optimization
The GameCube remake of Metal Gear Solid, a scripted stealth gauntlet that rewards memorized routes.
Brothers in Arms: Earned in Blood leans Optimization (Practiced Mastery); Metal Gear Solid: The Twin Snakes leans Optimization (Pure Optimization).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Brothers in Arms: Earned in Blood
Deliberately loose aim makes positioning matter more than twitch
Metal Gear Solid: The Twin Snakes
Boss fights and first-person aiming demand decent hands.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Brothers in Arms: Earned in Blood
AI flanks reactively but follows mappable suppress-and-flank logic
Metal Gear Solid: The Twin Snakes
Psycho Mantis only pretends to read you; all scripted.
Brothers in Arms: Earned in Blood leans a little harder on variance, though the gap is small.
Brothers in Arms: Earned in Blood
AI repositioning varies runs slightly between attempts
Metal Gear Solid: The Twin Snakes
Famous tricks are unknown once, then known forever.
Metal Gear Solid: The Twin Snakes leans a little harder on optimization, though the gap is small.
Brothers in Arms: Earned in Blood
Suppress-then-flank squad puzzles are the entire core loop
Metal Gear Solid: The Twin Snakes
Patrol routes and boss patterns converge to a solved run.
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.