head to head
Neither is simply harder - they are hard in different places. Grand Theft Auto V demands more reads; King's Knight demands more execution.

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

Execution · Practiced Mastery
A top-down shooter testing dodging plus careful party power-up management.
Grand Theft Auto V leans Execution (Practiced Mastery); King's Knight leans Execution (Practiced Mastery).
King's Knight leans clearly harder on execution.
Grand Theft Auto V
Driving and shooting demand decent inputs.
King's Knight
Dodging and shooting in the scrolling shooter demands precision
Grand Theft Auto V leans clearly harder on reads.
Grand Theft Auto V
Online PvP exists but mostly gear/positioning, not modeling.
King's Knight
Enemies follow scripted patterns, not adapting
King's Knight leans a little harder on variance, though the gap is small.
Grand Theft Auto V
Some mission and lobby randomness.
King's Knight
Hidden power-ups under terrain add uncertainty
King's Knight leans clearly harder on optimization.
Grand Theft Auto V
Heists, money loops, builds learnable.
King's Knight
Powering up every hero and routing is essential to survive
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.