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 · Grand Arena
A variation-based fighter where character specialisation choices and read-and-punish execution drive competitive outcomes.

Reads · Grand Arena
A shield-less platform fighter where the absence of defensive options forces constant aggressive reads against human opponents.
Mortal Kombat X leans Execution (Grand Arena); Rivals of Aether leans Reads (Grand Arena).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Mortal Kombat X
Variation-specific combo routes demand precise practice
Rivals of Aether
Wavedash movement and off-stage edgeguards require real physical precision
Rivals of Aether leans a little harder on reads, though the gap is small.
Mortal Kombat X
Reading opponent's variation choice and tendency shifts the matchup
Rivals of Aether
No shields forces constant adaptive prediction against human opponents
Rivals of Aether leans a little harder on variance, though the gap is small.
Mortal Kombat X
No RNG; transparent match flow
Rivals of Aether
Stage hazards add minor variance
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Mortal Kombat X
Variation selection and optimal punish routes require systematic study
Rivals of Aether
Elemental mechanic interactions and matchup routing reward 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.