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 · Practiced Mastery
Arena fighting where builds and combo execution meet light PvP prediction.

Execution · Competitive PvP
Shot timing and play-calling against opponents who scheme around your habits.
Dragon Ball: Xenoverse 2 leans Execution (Practiced Mastery); NBA 2K16 leans Execution (Competitive PvP).
NBA 2K16 leans a little harder on execution, though the gap is small.
Dragon Ball: Xenoverse 2
Combo strings and vanish timing need moderate hands
NBA 2K16
Shot-stick timing and dribble moves gate every possession
NBA 2K16 leans a little harder on reads, though the gap is small.
Dragon Ball: Xenoverse 2
PvP opponents bait supers and punish habits
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.
Dragon Ball: Xenoverse 2
QQ Bang crafting and drop rates randomise builds
NBA 2K16
Shot RNG and card packs add bounded randomness
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Dragon Ball: Xenoverse 2
Build stats and skill loadouts shape every matchup
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.