head to head
Crysis 2 asks more than Grand Theft Auto V, and the gap is execution.

Execution · Practiced Mastery
A nanosuit-powered FPS where you choose between cloaked stealth and armored assault through a ruined New York.

Execution · Practiced Mastery
Sandbox crime playground spanning shooting, driving, and a persistent online economy.
Crysis 2 leans Execution (Practiced Mastery); Grand Theft Auto V leans Execution (Practiced Mastery).
Crysis 2 leans clearly harder on execution.
Crysis 2
Aimbot trivialises every firefight; aim and movement carry it
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 2
Scripted Ceph and soldiers follow fixed patterns
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 2
Mostly known encounters with mild patrol randomness
Grand Theft Auto V
Some mission and lobby randomness.
Crysis 2 leans a little harder on optimization, though the gap is small.
Crysis 2
Suit energy management and choosing stealth-versus-armor approaches
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.