head to head
Grand Theft Auto V asks more than Yoku's Island Express, and the gap is reads.

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

Execution · Practiced Mastery
A pinball-platformer hybrid where flippers fling a mail-delivering beetle across an open island.
Grand Theft Auto V leans Execution (Practiced Mastery); Yoku's Island Express leans Execution (Practiced Mastery).
Yoku's Island Express leans a little harder on execution, though the gap is small.
Grand Theft Auto V
Driving and shooting demand decent inputs.
Yoku's Island Express
Pinball flipper timing drives all traversal
Grand Theft Auto V leans clearly harder on reads.
Grand Theft Auto V
Online PvP exists but mostly gear/positioning, not modeling.
Yoku's Island Express
Solo, nothing models you
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.
Yoku's Island Express
Ball physics adds small bounce unpredictability
Yoku's Island Express leans a little harder on optimization, though the gap is small.
Grand Theft Auto V
Heists, money loops, builds learnable.
Yoku's Island Express
Learning table layouts and exploration routes
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.