head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is optimization, and it is a single point.

Execution · Competitive PvP
Anime fighter debuting the Drive system and famously execution-heavy cast.

Execution · Grand Arena
Chaotic tag fighter whose top tiers reward blistering execution and assist mastery.
BlazBlue: Calamity Trigger leans Execution (Competitive PvP); Marvel vs. Capcom 2: New Age of Heroes leans Execution (Grand Arena).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
BlazBlue: Calamity Trigger
Long anime combos and tight defensive inputs
Marvel vs. Capcom 2: New Age of Heroes
infinite combos and assist timing demand elite hands
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
BlazBlue: Calamity Trigger
Human opponents demand constant conditioning and adaptation
Marvel vs. Capcom 2: New Age of Heroes
humans bait assists and mix high-low constantly
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
BlazBlue: Calamity Trigger
Negligible randomness in matches
Marvel vs. Capcom 2: New Age of Heroes
fully deterministic engine
Marvel vs. Capcom 2: New Age of Heroes leans a little harder on optimization, though the gap is small.
BlazBlue: Calamity Trigger
Frame data, drive mechanics, and matchup study
Marvel vs. Capcom 2: New Age of Heroes
team order, assist synergy, and matchup 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.