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
Shot timing and play selection against opponents adjusting to your tendencies.

Execution · Competitive PvP
Tests stick skills and constant prediction of a human opponent's attacking intent.
NBA 2K14 leans Execution (Competitive PvP); World Soccer Winning Eleven 6: Final Evolution leans Execution (Competitive PvP).
World Soccer Winning Eleven 6: Final Evolution leans a little harder on execution, though the gap is small.
NBA 2K14
Shot release timing and dribble chains gate scoring
World Soccer Winning Eleven 6: Final Evolution
First-touch timing, through-balls and finishing are mechanical skill
World Soccer Winning Eleven 6: Final Evolution leans a little harder on reads, though the gap is small.
NBA 2K14
Online opponents counter your favourite plays
World Soccer Winning Eleven 6: Final Evolution
Human opponents constantly disguise attacks and adjust defending
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
NBA 2K14
Shot RNG sways close possessions
World Soccer Winning Eleven 6: Final Evolution
Deflections and keeper bounces add minor chaos
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
NBA 2K14
Playbook knowledge and roster management reward study
World Soccer Winning Eleven 6: Final Evolution
Formations, Master League squad building reward system knowledge
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.