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
An immersive-sim shooter where combining plasmids and weapons into optimal builds is the deep layer.

Execution · Practiced Mastery
Claustrophobic post-apocalyptic shooter where bullets double as currency.
BioShock 2 Remastered leans Optimization (Practiced Mastery); Metro 2033 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.
BioShock 2 Remastered
aim and plasmid timing matter
Metro 2033
scarce-ammo gunfights punish sloppy aim
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
BioShock 2 Remastered
splicers are scripted, no adaptation
Metro 2033
mutants and bandits follow scripts
Metro 2033 leans a little harder on variance, though the gap is small.
BioShock 2 Remastered
loot and enemy spawns vary
Metro 2033
hidden moral points and supplies first run
BioShock 2 Remastered leans a little harder on optimization, though the gap is small.
BioShock 2 Remastered
plasmid and build synergies are solvable
Metro 2033
ammo-as-currency economy and stealth routing
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.