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
Football stick execution and opponent reading, salted with bounce-of-the-ball luck.

Execution · Competitive PvP
Arcade wrestling testing combo execution and reversal mind-games against humans.
FIFA Soccer 07 leans Execution (Competitive PvP); WWE All Stars 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 07
Stick skills and timing on passes and finishing
WWE All Stars
Juggle combos and reversal timing drive every match
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
FIFA Soccer 07
Versus humans, baiting tackles and disguising attacks matters
WWE All Stars
Human opponents bait reversals in constant mind-games
FIFA Soccer 07 leans a little harder on variance, though the gap is small.
FIFA Soccer 07
Deflections and keeper randomness swing single matches
WWE All Stars
Slight hit randomness rarely decides outcomes
FIFA Soccer 07 leans a little harder on optimization, though the gap is small.
FIFA Soccer 07
Formations and exploit patterns are learnable meta
WWE All Stars
Class matchups and move properties are quickly learnable
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.