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
Brutal cinematic stealth-action sequel where execution under pressure decides fights.
Grand Theft Auto V leans Execution (Practiced Mastery); The Last of Us Part II leans Execution (Practiced Mastery).
The Last of Us Part II leans a little harder on execution, though the gap is small.
Grand Theft Auto V
Driving and shooting demand decent inputs.
The Last of Us Part II
Faster, more demanding combat and dodge timing
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 Last of Us Part II
Smarter AI still runs mappable search scripts
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 Last of Us Part II
First-encounter unknowns only
The Last of Us Part II leans a little harder on optimization, though the gap is small.
Grand Theft Auto V
Heists, money loops, builds learnable.
The Last of Us Part II
Crafting economy and encounter route planning
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.