head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Execution · Practiced Mastery
A retro-Soviet action shooter mixing gunplay with light upgrade strategy.

Execution · Practiced Mastery
Columbia's sky-rail shooter wrapped in dimensional intrigue.
Atomic Heart leans Execution (Practiced Mastery); BioShock Infinite 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.
Atomic Heart
Shooting and dodging carry the combat.
BioShock Infinite
Skyline traversal and aiming reward inputs.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Atomic Heart
Robot enemies follow scripted patterns.
BioShock Infinite
Enemies scripted in arena waves.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Atomic Heart
Encounters largely fixed.
BioShock Infinite
Loot drops mildly randomized.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Atomic Heart
Upgrades and weapon crafting learnable.
BioShock Infinite
Gear, vigors, weapon picks straightforward.
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.