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
Arena duels mixing twitch dodge-punish play with RPG build preparation.
Def Jam: Fight for NY leans Execution (Competitive PvP); Dissidia Final Fantasy leans Execution (Practiced Mastery).
Dissidia Final Fantasy 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.
Dissidia Final Fantasy
Aerial dashes, dodge timing and punishes demand fast hands
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.
Dissidia Final Fantasy
Human duels hinge on baiting bravery attacks and dodges
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.
Dissidia Final Fantasy
Some equipment and summon randomness, mostly known state
Dissidia Final Fantasy leans a little harder on optimization, though the gap is small.
Def Jam: Fight for NY
Fighting-style blends, move purchases, venue weapons reward system knowledge.
Dissidia Final Fantasy
Builds, accessories and matchup knowledge shape every duel
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.