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.

Execution · Competitive PvP
Supercell's snappy top-down team brawler built around three-minute objective fights.
Aion leans Execution (Practiced Mastery); Brawl Stars 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.
Aion
Aerial combat and combo chaining require timing and positioning
Brawl Stars
Aim, dodging, and ability timing in real time
Brawl Stars leans a little harder on reads, though the gap is small.
Aion
Rifting and Abyss PvP feature real adaptive opponents
Brawl Stars
Human teams rotate, bait supers, and adapt
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
Brawl Stars
Bush ambushes and power-cube spawns hide information
Aion leans a little harder on optimization, though the gap is small.
Aion
Manastones and gear sets have well-known optimal configurations
Brawl Stars
Brawler matchups and map strategy are 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.