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
The beloved upgrade of Fatal Fury 2 whose two-plane stages add a dodge dimension to classic footsies.

Execution · Competitive PvP
High-speed tag-team execution and human prediction in gleeful early-Versus chaos.
Fatal Fury Special 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.
Fatal Fury Special
Strict motion inputs and combo timing typical of 90s SNK.
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.
Fatal Fury Special
Two-plane dodging adds a guessing layer to human footsies.
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.
Fatal Fury Special
Deterministic; nothing hidden.
Marvel vs. Capcom: Clash of Super Heroes
Hidden characters aside, everything is public
Marvel vs. Capcom: Clash of Super Heroes leans a little harder on optimization, though the gap is small.
Fatal Fury Special
Punish routes and plane-shift tactics are learnable.
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.