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
Shot-timing execution and play-reading against human defensive schemes.

Execution · Competitive PvP
Free-to-play hero shooter where loadout cards customize champions in objective team fights.
NBA 2K18 leans Execution (Competitive PvP); Paladins 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.
NBA 2K18
Shot timing and stick handles decide possessions
Paladins
Hitscan aim and ability timing in firefights
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
NBA 2K18
Online, baiting defenders and reading schemes is constant
Paladins
Human teams flank, bait ults, and adapt
NBA 2K18 leans a little harder on variance, though the gap is small.
NBA 2K18
Shot RNG and physics bounces add measured noise
Paladins
Card draft order adds mild run variance
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
NBA 2K18
Roster builds, playbooks and matchup hunting reward study
Paladins
Loadout card builds and item counter-buying
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.