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 · Competitive PvP
An air-dash anime fighter where pairing each girl with an elemental Arcana doubles the roster math.

Execution · Grand Arena
A variation-based fighter where character specialisation choices and read-and-punish execution drive competitive outcomes.
Arcana Heart 3 leans Execution (Competitive PvP); Mortal Kombat X leans Execution (Grand Arena).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Arcana Heart 3
Homing dashes and extended air combos need fast precise inputs.
Mortal Kombat X
Variation-specific combo routes demand precise practice
Mortal Kombat X leans a little harder on reads, though the gap is small.
Arcana Heart 3
Full-screen approach mixups against humans stay adaptive.
Mortal Kombat X
Reading opponent's variation choice and tendency shifts the matchup
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Arcana Heart 3
Deterministic; arcana chosen openly.
Mortal Kombat X
No RNG; transparent match flow
Mortal Kombat X leans a little harder on optimization, though the gap is small.
Arcana Heart 3
Character-arcana pairings multiply the labbable matchup space.
Mortal Kombat X
Variation selection and optimal punish routes require systematic study
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.