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 crime playground spanning shooting, driving, and a persistent online economy.

Execution · Practiced Mastery
Sixties spy-comedy FPS mixing stealth, gadgets, and shootouts as agent Cate Archer.
Grand Theft Auto V leans Execution (Practiced Mastery); The Operative: No One Lives Forever leans Execution (Practiced Mastery).
The Operative: No One Lives Forever leans a little harder on execution, though the gap is small.
Grand Theft Auto V
Driving and shooting demand decent inputs.
The Operative: No One Lives Forever
Period gunplay and stealth timing carry missions
Grand Theft Auto V leans a little harder on reads, though the gap is small.
Grand Theft Auto V
Online PvP exists but mostly gear/positioning, not modeling.
The Operative: No One Lives Forever
Guards run scripted patrol AI
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Grand Theft Auto V
Some mission and lobby randomness.
The Operative: No One Lives Forever
First-run surprises in level scripting
The Operative: No One Lives Forever leans a little harder on optimization, though the gap is small.
Grand Theft Auto V
Heists, money loops, builds learnable.
The Operative: No One Lives Forever
Gadget use, stealth routes, and intelligence hunting
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.