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

Optimization · Practiced Mastery
Active dodge-heavy combat with a deep build system, tested against both scripted content and human opponents.
Aion leans Execution (Practiced Mastery); Guild Wars 2 leans Optimization (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Aion
Aerial combat and combo chaining require timing and positioning
Guild Wars 2
Dodge timing and active combat define moment-to-moment play
Aion leans a little harder on reads, though the gap is small.
Aion
Rifting and Abyss PvP feature real adaptive opponents
Guild Wars 2
WvW and structured PvP feature real adaptive opponents
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Aion
Enchantment stone RNG is a meaningful hidden-information layer
Guild Wars 2
Loot RNG is present but secondary to skill expression
Guild Wars 2 leans a little harder on optimization, though the gap is small.
Aion
Manastones and gear sets have well-known optimal configurations
Guild Wars 2
Build crafting and rotation theory-crafting reward deep analysis
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.