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
Arc System Works' Dungeon Fighter spinoff where an MP meter turns specials into a resource economy.

Execution · Competitive PvP
High-speed tag-team execution and human prediction in gleeful early-Versus chaos.
DNF Duel leans Execution (Competitive PvP); Marvel vs. Capcom: Clash of Super Heroes leans Execution (Competitive PvP).
Marvel vs. Capcom: Clash of Super Heroes leans a little harder on execution, though the gap is small.
DNF Duel
MP skill combos are lenient but conversions still need hands.
Marvel vs. Capcom: Clash of Super Heroes
Chain combos, assists and infinites demand fast precise hands
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
DNF Duel
White-damage pressure and Awakening baits drive human yomi.
Marvel vs. Capcom: Clash of Super Heroes
Baiting a human's assist call or super is the duel
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
DNF Duel
Deterministic systems throughout.
Marvel vs. Capcom: Clash of Super Heroes
Hidden characters aside, everything is public
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
DNF Duel
MP economy management is the distinctive solvable layer.
Marvel vs. Capcom: Clash of Super Heroes
Team composition and infinite-combo knowledge define the meta
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.