head to head
Kingdom Hearts: Chain of Memories 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
A card-driven retelling where Sora battles through Castle Oblivion using real-time deck combat.
Grand Theft Auto V leans Execution (Practiced Mastery); Kingdom Hearts: Chain of Memories leans Optimization (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Grand Theft Auto V
Driving and shooting demand decent inputs.
Kingdom Hearts: Chain of Memories
Real-time card play needs quick hands
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.
Kingdom Hearts: Chain of Memories
Boss decks are fixed, not adaptive
Kingdom Hearts: Chain of Memories leans clearly harder on variance.
Grand Theft Auto V
Some mission and lobby randomness.
Kingdom Hearts: Chain of Memories
Card draws and sleights add draw luck
Kingdom Hearts: Chain of Memories leans clearly harder on optimization.
Grand Theft Auto V
Heists, money loops, builds learnable.
Kingdom Hearts: Chain of Memories
Deck construction largely decides every fight
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.