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

Execution · Practiced Mastery
Arena dueling that mixes build preparation with execution and opponent prediction.

Execution · Competitive PvP
Shot timing and play-calling against opponents who scheme around your habits.
Dissidia 012 Final Fantasy leans Execution (Practiced Mastery); NBA 2K16 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.
Dissidia 012 Final Fantasy
Aerial chases and punish timing demand real dexterity
NBA 2K16
Shot-stick timing and dribble moves gate every possession
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Dissidia 012 Final Fantasy
Versus humans, bravery mind-games and bait punishes matter
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.
Dissidia 012 Final Fantasy
Little randomness once movesets are known
NBA 2K16
Shot RNG and card packs add bounded randomness
Dissidia 012 Final Fantasy leans a little harder on optimization, though the gap is small.
Dissidia 012 Final Fantasy
Builds, equipment and matchup knowledge shape every fight
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.