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

Execution · Competitive PvP
A test of precise inputs and constant human prediction across a fixed roster of matchup puzzles.
Marvel vs. Capcom 2: New Age of Heroes leans Execution (Grand Arena); Street Fighter II: The World Warrior 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
Street Fighter II: The World Warrior
Frame-precise inputs and combo timing define every matchup
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
Street Fighter II: The World Warrior
Predicting human opponent's next move is constant and non-convergent
Same score on variance - 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
fully deterministic engine
Street Fighter II: The World Warrior
No meaningful RNG; match outcomes are skill-determined
Marvel vs. Capcom 2: New Age of Heroes leans a little harder on optimization, though the gap is small.
Marvel vs. Capcom 2: New Age of Heroes
team order, assist synergy, and matchup knowledge
Street Fighter II: The World Warrior
Character matchups and punish routes are learnable but not fully 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.
full breakdown
Marvel vs. Capcom 2: New Age of Heroes →
full breakdown
Street Fighter II: The World Warrior →