head to head
Monster Hunter: World asks more than Grand Theft Auto V, and the gap is optimization.

Execution · Practiced Mastery
Sandbox crime playground spanning shooting, driving, and a persistent online economy.

Optimization · Practiced Mastery
Breakout Monster Hunter where learning each beast's moveset turns terror into routine.
Grand Theft Auto V leans Execution (Practiced Mastery); Monster Hunter: World leans Optimization (Practiced Mastery).
Monster Hunter: World leans clearly harder on execution.
Grand Theft Auto V
Driving and shooting demand decent inputs.
Monster Hunter: World
Deliberate weapon timing against huge movesets
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.
Monster Hunter: World
Monsters are learnable scripts, never adaptive
Monster Hunter: World leans a little harder on variance, though the gap is small.
Grand Theft Auto V
Some mission and lobby randomness.
Monster Hunter: World
Decoration drops are notorious RNG
Monster Hunter: World leans clearly harder on optimization.
Grand Theft Auto V
Heists, money loops, builds learnable.
Monster Hunter: World
Knowing the monster and building counters is the game
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.