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

Execution · Practiced Mastery
Prequel chronicling Noble Team's doomed defence, with armour abilities reshaping multiplayer.
Def Jam: Fight for NY leans Execution (Competitive PvP); Halo: Reach leans Execution (Practiced Mastery).
Halo: Reach leans a little harder on execution, though the gap is small.
Def Jam: Fight for NY
Combo timing, grapple inputs, environment slams demand solid hands.
Halo: Reach
DMR precision and armour-ability timing
Def Jam: Fight for NY leans a little harder on reads, though the gap is small.
Def Jam: Fight for NY
Versus humans, baiting grabs and counters matters; AI is mappable.
Halo: Reach
Multiplayer rewards predicting human movement
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.
Halo: Reach
Loadouts and spawns add small swings
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.
Halo: Reach
Ability matchups and map knowledge
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.