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
Tests shot-stick timing and badge-build optimization against human defenders.

Execution · Competitive PvP
Execution on the ball plus constant prediction of the other player's shape.
NBA 2K20 leans Execution (Competitive PvP); Pro Evolution Soccer 2009 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 2K20
Shot timing and dribble combos require practiced stick work
Pro Evolution Soccer 2009
Close control and finishing windows demand stick precision
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
NBA 2K20
Outguessing human defenders and callers decides online possessions
Pro Evolution Soccer 2009
Online and couch opponents adjust tactics against you
NBA 2K20 leans a little harder on variance, though the gap is small.
NBA 2K20
Shot RNG and rebounds swing tight games
Pro Evolution Soccer 2009
Ricochets and keeper parries add small randomness
NBA 2K20 leans a little harder on optimization, though the gap is small.
NBA 2K20
Builds, badges and playbook knowledge dominate MyCareer and online
Pro Evolution Soccer 2009
Squad setup and tactical sliders reward preparation
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.