head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is variance, 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 genuine fighting game testing execution and opponent conditioning under anime skin.
Splatoon leans Execution (Competitive PvP); Super Dragon Ball Z 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.
Splatoon
Aim, swim-form movement and ink management are constant demands
Super Dragon Ball Z
Street Fighter pedigree shows - spacing and combo execution rule
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
Super Dragon Ball Z
Human opponents must be conditioned and baited
Splatoon leans a little harder on variance, though the gap is small.
Splatoon
Hidden squids in ink create momentary information gaps
Super Dragon Ball Z
Nothing hidden once movesets are learned
Splatoon leans a little harder on optimization, though the gap is small.
Splatoon
Weapon kits, map control timing and gear builds reward study
Super Dragon Ball Z
Skill-tree customisation and matchup study reward lab time
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.