head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is reads, and it is a single point.

Execution · Competitive PvP
A military shooter testing aim with moderate prediction of human opponents online.

Execution · Competitive PvP
Execution on the ball plus constant prediction of the other player's shape.
Medal of Honor: Warfighter 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.
Medal of Honor: Warfighter
Gunfights reward aim in both campaign and multiplayer
Pro Evolution Soccer 2009
Close control and finishing windows demand stick precision
Pro Evolution Soccer 2009 leans a little harder on reads, though the gap is small.
Medal of Honor: Warfighter
Human opponents in multiplayer demand positional prediction
Pro Evolution Soccer 2009
Online and couch opponents adjust tactics against you
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Medal of Honor: Warfighter
Spawns and engagements add modest unpredictability
Pro Evolution Soccer 2009
Ricochets and keeper parries add small randomness
Pro Evolution Soccer 2009 leans a little harder on optimization, though the gap is small.
Medal of Honor: Warfighter
Class loadouts and map knowledge form a thin layer
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.