head to head
Street Fighter III: 3rd Strike asks more than Ultimate Marvel vs. Capcom 3, and the gap is reads.

Reads · Competitive PvP
A parry system that elevates reads to the central skill axis, with execution demands that remain punishing decades later.

Execution · Grand Arena
A hyper-fast tag fighting game defined by three-character teams and touch-of-death combos.
Street Fighter III: 3rd Strike leans Reads (Competitive PvP); Ultimate Marvel vs. Capcom 3 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.
Street Fighter III: 3rd Strike
SA combo links and precise parry timing set an extreme execution ceiling
Ultimate Marvel vs. Capcom 3
Long touch-of-death combos demand elite hands
Street Fighter III: 3rd Strike leans clearly harder on reads.
Street Fighter III: 3rd Strike
Parry is a pure real-time read against an adapting human - the defining mechanic
Ultimate Marvel vs. Capcom 3
Mixups and assist baits versus adapting humans
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Street Fighter III: 3rd Strike
No RNG; all information is transparent
Ultimate Marvel vs. Capcom 3
Almost fully deterministic
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Street Fighter III: 3rd Strike
Super Art selection and character punish routing are well-studied
Ultimate Marvel vs. Capcom 3
Team composition and matchup knowledge run deep
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.