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
Sandbox FPS where a nanosuit lets you choose speed, strength, or stealth per fight.

Execution · Practiced Mastery
Sandbox crime playground spanning shooting, driving, and a persistent online economy.
Crysis leans Execution (Practiced Mastery); Grand Theft Auto V leans Execution (Practiced Mastery).
Crysis leans a little harder on execution, though the gap is small.
Crysis
gunplay and suit-mode switching mid-fight
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
AI soldiers are scripted searchers
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
open encounters play out unpredictably at first
Grand Theft Auto V
Some mission and lobby randomness.
Crysis leans a little harder on optimization, though the gap is small.
Crysis
suit energy management and approach planning
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.