head to head
Marvel vs. Capcom 2: New Age of Heroes asks more than Mordhau, and the gap is optimization.

Execution · Grand Arena
Chaotic tag fighter whose top tiers reward blistering execution and assist mastery.

Execution · Competitive PvP
Hardcore medieval melee combat sim.
Marvel vs. Capcom 2: New Age of Heroes leans Execution (Grand Arena); Mordhau 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.
Marvel vs. Capcom 2: New Age of Heroes
infinite combos and assist timing demand elite hands
Mordhau
Drag-and-accel swings are mechanical depth
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Marvel vs. Capcom 2: New Age of Heroes
humans bait assists and mix high-low constantly
Mordhau
Feints versus parries are pure reads
Mordhau leans a little harder on variance, though the gap is small.
Marvel vs. Capcom 2: New Age of Heroes
fully deterministic engine
Mordhau
Very low RNG, near pure skill
Marvel vs. Capcom 2: New Age of Heroes leans clearly harder on optimization.
Marvel vs. Capcom 2: New Age of Heroes
team order, assist synergy, and matchup knowledge
Mordhau
Loadout points and perks solvable
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.