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
Timing on the ball and outguessing the opposing player's tactics.

Execution · Competitive PvP
Tests grapple timing and predicting an opponent's next move choice.
FIFA Soccer 06 leans Execution (Competitive PvP); WWF SmackDown! 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.
FIFA Soccer 06
First-touch control and shot timing decide chances
WWF SmackDown!
Grapple timing and reversal inputs decide exchanges
WWF SmackDown! leans a little harder on reads, though the gap is small.
FIFA Soccer 06
Human opponents vary attack patterns and bait tackles
WWF SmackDown!
Against a friend, predicting grapple choices is the game
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
FIFA Soccer 06
Bounces and keeper spills inject small randomness
WWF SmackDown!
Some reversal and AI randomness in season mode
FIFA Soccer 06 leans a little harder on optimization, though the gap is small.
FIFA Soccer 06
Squad selection and tactics reward preparation
WWF SmackDown!
Move-set knowledge and stamina management are shallow but real
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.