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

Execution · Practiced Mastery
A PvP-centric MMO where aerial execution and reading opponents in Abyss battles define competitive performance.

Execution · Practiced Mastery
Sandbox crime playground spanning shooting, driving, and a persistent online economy.
Aion leans Execution (Practiced Mastery); Grand Theft Auto V leans Execution (Practiced Mastery).
Aion leans a little harder on execution, though the gap is small.
Aion
Aerial combat and combo chaining require timing and positioning
Grand Theft Auto V
Driving and shooting demand decent inputs.
Aion leans clearly harder on reads.
Aion
Rifting and Abyss PvP feature real adaptive opponents
Grand Theft Auto V
Online PvP exists but mostly gear/positioning, not modeling.
Aion leans a little harder on variance, though the gap is small.
Aion
Enchantment stone RNG is a meaningful hidden-information layer
Grand Theft Auto V
Some mission and lobby randomness.
Aion leans clearly harder on optimization.
Aion
Manastones and gear sets have well-known optimal configurations
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.