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.

Execution · Competitive PvP
Territory control through shooter execution and constant prediction of adapting human teams.

Execution · Competitive PvP
A wrestling game testing grapple timing and reversal prediction against opponents.
Splatoon leans Execution (Competitive PvP); WWE Day of Reckoning 2 leans Execution (Competitive PvP).
Splatoon leans a little harder on execution, though the gap is small.
Splatoon
Aim, swim-form movement and ink management are constant demands
WWE Day of Reckoning 2
Grapple and reversal timing windows demand precision
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Splatoon
Human opponents adapt flanks and pushes every match
WWE Day of Reckoning 2
Versus humans, predicting strikes and reversals is constant
WWE Day of Reckoning 2 leans a little harder on variance, though the gap is small.
Splatoon
Hidden squids in ink create momentary information gaps
WWE Day of Reckoning 2
Reversal and pin outcomes carry some randomness
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Splatoon
Weapon kits, map control timing and gear builds reward study
WWE Day of Reckoning 2
Move-set knowledge and stamina management 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.