head to head
Grand Theft Auto V asks more than Apes vs Helium, and the gap is reads.

Execution · Practiced Mastery
Aiming at bloon waves while solving a tower-defense upgrade economy first-person.

Execution · Practiced Mastery
Sandbox crime playground spanning shooting, driving, and a persistent online economy.
Apes vs Helium leans Execution (Practiced Mastery); Grand Theft Auto V leans Execution (Practiced Mastery).
Apes vs Helium leans a little harder on execution, though the gap is small.
Apes vs Helium
An aimbot popping every bloon would trivialise the waves
Grand Theft Auto V
Driving and shooting demand decent inputs.
Grand Theft Auto V leans clearly harder on reads.
Apes vs Helium
Bloons follow fixed tracks, nothing adapts
Grand Theft Auto V
Online PvP exists but mostly gear/positioning, not modeling.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Apes vs Helium
Wave composition is learnable, little stays hidden
Grand Theft Auto V
Some mission and lobby randomness.
Apes vs Helium leans a little harder on optimization, though the gap is small.
Apes vs Helium
Upgrade and class economy against known waves is solvable
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.