head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is reads, and it is a single point.

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

Execution · Competitive PvP
An arcade soccer novelty testing timing around special-shot chaos.
Grand Theft Auto V leans Execution (Practiced Mastery); Mega Man Soccer leans Execution (Competitive PvP).
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.
Mega Man Soccer
Sluggish controls still reward shot timing and positioning
Mega Man Soccer leans a little harder on reads, though the gap is small.
Grand Theft Auto V
Online PvP exists but mostly gear/positioning, not modeling.
Mega Man Soccer
Human opponents add light positional guessing
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.
Mega Man Soccer
Special-shot chaos adds some randomness
Grand Theft Auto V leans a little harder on optimization, though the gap is small.
Grand Theft Auto V
Heists, money loops, builds learnable.
Mega Man Soccer
Team composition and special-shot management are shallow systems
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.