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

Execution · Practiced Mastery
A twin-stick looter shooter blending Housemarque arcade reflexes with a loot-grind build layer.

Execution · Practiced Mastery
Claustrophobic post-apocalyptic shooter where bullets double as currency.
Alienation leans Execution (Practiced Mastery); Metro 2033 leans Execution (Practiced Mastery).
Alienation leans a little harder on execution, though the gap is small.
Alienation
Twin-stick aim and dodge under heavy swarm pressure.
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.
Alienation
Alien hordes never adapt.
Metro 2033
mutants and bandits follow scripts
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Alienation
Random loot cores and weapon rolls.
Metro 2033
hidden moral points and supplies first run
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Alienation
Build and core-socketing choices scale the endgame.
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.