head to head
Grand Theft Auto: San Andreas asks more than Atomic Heart, and the gap is optimization.

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

Optimization · Practiced Mastery
A sprawling open-world crime epic with RPG-style character stats across a whole state.
Atomic Heart leans Execution (Practiced Mastery); Grand Theft Auto: San Andreas leans Optimization (Practiced Mastery).
Atomic Heart leans a little harder on execution, though the gap is small.
Atomic Heart
Shooting and dodging carry the combat.
Grand Theft Auto: San Andreas
Flying school and drive-bys need decent hands
Atomic Heart leans a little harder on reads, though the gap is small.
Atomic Heart
Robot enemies follow scripted patterns.
Grand Theft Auto: San Andreas
Gang AI is scripted, never adaptive
Grand Theft Auto: San Andreas leans a little harder on variance, though the gap is small.
Atomic Heart
Encounters largely fixed.
Grand Theft Auto: San Andreas
Territory wars and traffic add light randomness
Grand Theft Auto: San Andreas leans clearly harder on optimization.
Atomic Heart
Upgrades and weapon crafting learnable.
Grand Theft Auto: San Andreas
Stats, gym, weapon skill, and routes reward systematic play
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.