head to head
Grand Theft Auto V asks more than Scott Pilgrim vs. the World: The Game, and the gap is reads.

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

Execution · Practiced Mastery
Beat-em-up spacing and combos boosted by memorised stat and shop routes.
Grand Theft Auto V leans Execution (Practiced Mastery); Scott Pilgrim vs. the World: The Game leans Execution (Practiced Mastery).
Scott Pilgrim vs. the World: The Game leans a little harder on execution, though the gap is small.
Grand Theft Auto V
Driving and shooting demand decent inputs.
Scott Pilgrim vs. the World: The Game
Crowd control, spacing and combo timing carry fights
Grand Theft Auto V leans clearly harder on reads.
Grand Theft Auto V
Online PvP exists but mostly gear/positioning, not modeling.
Scott Pilgrim vs. the World: The Game
Enemies and exes use fixed scripted patterns
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.
Scott Pilgrim vs. the World: The Game
Shop items and drops add light run noise
Scott Pilgrim vs. the World: The Game leans a little harder on optimization, though the gap is small.
Grand Theft Auto V
Heists, money loops, builds learnable.
Scott Pilgrim vs. the World: The Game
Stat grinding and shop knowledge trivialise later levels
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.