head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is execution, and it is a single point.

Reads · Grand Arena
A shield-less platform fighter where the absence of defensive options forces constant aggressive reads against human opponents.

Execution · Grand Arena
A 3D fighter where movement and mixup reads decide rounds.
Rivals of Aether leans Reads (Grand Arena); Tekken 8 leans Execution (Grand Arena).
Tekken 8 leans a little harder on execution, though the gap is small.
Rivals of Aether
Wavedash movement and off-stage edgeguards require real physical precision
Tekken 8
Just-frame inputs and 3D movement punish sloppy hands.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Rivals of Aether
No shields forces constant adaptive prediction against human opponents
Tekken 8
Adaptive opponents mix lows, highs, and throws.
Rivals of Aether leans a little harder on variance, though the gap is small.
Rivals of Aether
Stage hazards add minor variance
Tekken 8
Negligible RNG in core matches.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Rivals of Aether
Elemental mechanic interactions and matchup routing reward study
Tekken 8
Frame data, punishes, and movelist depth.
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.