head to head
Neither is simply harder - they are hard in different places. God of War demands more execution; Grand Theft Auto V demands more reads.

Execution · Practiced Mastery
A brutal Greek-myth action game where Kratos carves through gods with chained blades.

Execution · Practiced Mastery
Sandbox crime playground spanning shooting, driving, and a persistent online economy.
God of War leans Execution (Practiced Mastery); Grand Theft Auto V leans Execution (Practiced Mastery).
God of War leans clearly harder on execution.
God of War
Combo timing, dodges, and QTEs set the bar
Grand Theft Auto V
Driving and shooting demand decent inputs.
Grand Theft Auto V leans clearly harder on reads.
God of War
Bosses follow fixed scripted patterns
Grand Theft Auto V
Online PvP exists but mostly gear/positioning, not modeling.
Grand Theft Auto V leans a little harder on variance, though the gap is small.
God of War
Encounters are essentially deterministic
Grand Theft Auto V
Some mission and lobby randomness.
God of War leans clearly harder on optimization.
God of War
Learning movesets, upgrades, and puzzles is the other half
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.