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

Execution · Competitive PvP
Stick execution and outguessing a human defender, with tactics underneath.

Execution · Pure Mechanics
Free-to-play military shooter mixing class-based PvP with co-op missions.
FIFA Soccer 08 leans Execution (Competitive PvP); Warface leans Execution (Pure Mechanics).
Warface leans a little harder on execution, though the gap is small.
FIFA Soccer 08
Dribbling, timing tackles and finishing reward stick skill
Warface
Aimbot dominates gunfights; recoil control and flick aim decide duels.
FIFA Soccer 08 leans a little harder on reads, though the gap is small.
FIFA Soccer 08
Versus humans, baiting defenders and disguising attacks is core
Warface
Human PvP positioning and peek mind-games in versus modes.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
FIFA Soccer 08
Ball physics adds bounce noise to single matches
Warface
Spawn and enemy position uncertainty, minor.
Warface leans a little harder on optimization, though the gap is small.
FIFA Soccer 08
Formations and squad selection matter but stay shallow
Warface
Loadout grind and class synergy matter but are mappable.
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.