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
Large-battle aim and positioning with light prediction against human players.

Execution · Competitive PvP
Timing-based reversals and grapple prediction inside a wrestling simulation.
Star Wars: Battlefront II leans Execution (Competitive PvP); WWE 2K18 leans Execution (Competitive PvP).
Star Wars: Battlefront II leans a little harder on execution, though the gap is small.
Star Wars: Battlefront II
Aimbot dominates infantry fights and starfighter dogfights
WWE 2K18
Reversal timing and combo inputs decide exchanges
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Star Wars: Battlefront II
Human opponents in multiplayer create modest prediction play
WWE 2K18
Human matches turn on predicting grapple and reversal habits
Star Wars: Battlefront II leans a little harder on variance, though the gap is small.
Star Wars: Battlefront II
Spawns, vehicle availability and hero pickups add chaos
WWE 2K18
Momentum and AI quirks add mild noise
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Star Wars: Battlefront II
Class choice and map control reward learned plans
WWE 2K18
Move-set knowledge and stamina management underpin wins
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.