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
Stick execution and outguessing a human defender, with tactics underneath.

Execution · Competitive PvP
Couch-competitive dexterity duels where reading the friend beside you wins games.
FIFA Soccer 08 leans Execution (Competitive PvP); Sportsfriends 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 08
Dribbling, timing tackles and finishing reward stick skill
Sportsfriends
Pole vaults, joust balance and ball control demand real dexterity
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
FIFA Soccer 08
Versus humans, baiting defenders and disguising attacks is core
Sportsfriends
Couch opponents bait and adapt face-to-face every round
FIFA Soccer 08 leans a little harder on variance, though the gap is small.
FIFA Soccer 08
Ball physics adds bounce noise to single matches
Sportsfriends
Arenas are fixed, nothing hidden
FIFA Soccer 08 leans a little harder on optimization, though the gap is small.
FIFA Soccer 08
Formations and squad selection matter but stay shallow
Sportsfriends
Minimal systems - the games are deliberately simple rulesets
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.