head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Execution · Competitive PvP
A hip-hop themed brawler where customized fighters batter each other through New York clubs.

Execution · Competitive PvP
Shot timing and play-calling against opponents who scheme around your habits.
Def Jam: Fight for NY leans Execution (Competitive PvP); 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.
Def Jam: Fight for NY
Combo timing, grapple inputs, environment slams demand solid hands.
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.
Def Jam: Fight for NY
Versus humans, baiting grabs and counters matters; AI is mappable.
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.
Def Jam: Fight for NY
Minor stage and AI behaviour randomness.
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.
Def Jam: Fight for NY
Fighting-style blends, move purchases, venue weapons reward system knowledge.
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.