head to head
NBA 2K16 asks more than FIFA Soccer 08, and the gap is optimization.

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

Execution · Competitive PvP
Shot timing and play-calling against opponents who scheme around your habits.
FIFA Soccer 08 leans Execution (Competitive PvP); NBA 2K16 leans Execution (Competitive PvP).
FIFA Soccer 08 leans a little harder on execution, though the gap is small.
FIFA Soccer 08
Dribbling, timing tackles and finishing reward stick skill
NBA 2K16
Shot-stick timing and dribble moves gate every possession
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
NBA 2K16
Online opponents adjust defensive schemes against your tendencies
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
NBA 2K16
Shot RNG and card packs add bounded randomness
NBA 2K16 leans clearly harder on optimization.
FIFA Soccer 08
Formations and squad selection matter but stay shallow
NBA 2K16
Playbooks, rotations and roster building reward deep study
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.