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
An early 3D soccer sim testing ball control and play against opponents.

Execution · Competitive PvP
Reversal timing and pacing against an opponent baiting your counters.
VR Soccer leans Execution (Competitive PvP); WWE 2K15 leans Execution (Competitive PvP).
VR Soccer leans a little harder on execution, though the gap is small.
VR Soccer
Controlling players, passing and shooting needs timing
WWE 2K15
Reversal timing windows decide most exchanges
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
VR Soccer
Human opponents read passes and feints adaptively
WWE 2K15
Human opponents bait reversals and vary move timing
VR Soccer leans a little harder on variance, though the gap is small.
VR Soccer
Ball physics and outcomes carry sports randomness
WWE 2K15
Chain-wrestling rock-paper-scissors minigames add randomness
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
VR Soccer
Formation and play strategy matter modestly
WWE 2K15
Move sets, stamina and match pacing are learnable systems
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.