head to head
Grand Theft Auto V asks more than A Story About My Uncle, and the gap is reads.

Execution · Practiced Mastery
A non-violent platformer testing grappling-swing timing through fixed first-person courses.

Execution · Practiced Mastery
Sandbox crime playground spanning shooting, driving, and a persistent online economy.
A Story About My Uncle leans Execution (Practiced Mastery); Grand Theft Auto V leans Execution (Practiced Mastery).
A Story About My Uncle leans a little harder on execution, though the gap is small.
A Story About My Uncle
Grappling-hook swings demand momentum timing and aim
Grand Theft Auto V
Driving and shooting demand decent inputs.
Grand Theft Auto V leans clearly harder on reads.
A Story About My Uncle
No opponents exist at all
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.
A Story About My Uncle
Course layouts are fixed and visible
Grand Theft Auto V
Some mission and lobby randomness.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
A Story About My Uncle
Finding efficient swing lines through each cavern
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.