head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Execution · Competitive PvP
Free-to-play hero shooter where loadout cards customize champions in objective team fights.

Execution · Competitive PvP
Movement-heavy shooting where map control and reading enemy pushes decide matches.
Paladins leans Execution (Competitive PvP); Splatoon 3 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.
Paladins
Hitscan aim and ability timing in firefights
Splatoon 3
Aim, squid movement and ink mobility decide engagements
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Paladins
Human teams flank, bait ults, and adapt
Splatoon 3
Turf and ranked battles hinge on predicting adapting human squads
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Paladins
Card draft order adds mild run variance
Splatoon 3
Matchmaking and special timing add modest noise
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Paladins
Loadout card builds and item counter-buying
Splatoon 3
Gear builds, weapon kits and map control patterns are studied
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.