head to head
Crysis 3 asks more than Grand Theft Auto V, and the gap is execution.

Execution · Practiced Mastery
A nanosuit shooter blending bow stealth and heavy firepower across an overgrown New York dome.

Execution · Practiced Mastery
Sandbox crime playground spanning shooting, driving, and a persistent online economy.
Crysis 3 leans Execution (Practiced Mastery); Grand Theft Auto V leans Execution (Practiced Mastery).
Crysis 3 leans clearly harder on execution.
Crysis 3
Bow shots, gunplay, and suit movement set the ceiling
Grand Theft Auto V
Driving and shooting demand decent inputs.
Grand Theft Auto V leans a little harder on reads, though the gap is small.
Crysis 3
Enemy AI is scripted, not adaptive to your habits
Grand Theft Auto V
Online PvP exists but mostly gear/positioning, not modeling.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Crysis 3
Encounters are largely fixed once learned
Grand Theft Auto V
Some mission and lobby randomness.
Crysis 3 leans a little harder on optimization, though the gap is small.
Crysis 3
Energy budgeting and route choice through sandbox arenas
Grand Theft Auto V
Heists, money loops, builds learnable.
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.