head to head
Virtua Fighter 5: Final Showdown asks more than Ultra Street Fighter IV, and the gap is optimization.

Execution · Grand Arena
Frame-perfect execution fused with constant prediction of an adapting human opponent.

Execution · Grand Arena
Often called the most pure expression of high-level 3D fighting, built almost entirely on frame-data optimisation and throw-tech reads.
Ultra Street Fighter IV leans Execution (Grand Arena); Virtua Fighter 5: Final Showdown 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.
Ultra Street Fighter IV
One-frame links and FADC timing set a brutal hands ceiling
Virtua Fighter 5: Final Showdown
Precise evade directions and just-frame throws set a high execution standard
Virtua Fighter 5: Final Showdown leans a little harder on reads, though the gap is small.
Ultra Street Fighter IV
Footsies and conditioning the human opponent is the core duel
Virtua Fighter 5: Final Showdown
Throw-tech guessing and opponent tendency exploitation are the core loop
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Ultra Street Fighter IV
Almost nothing hidden once both characters are known
Virtua Fighter 5: Final Showdown
No RNG; all information is transparent
Virtua Fighter 5: Final Showdown leans clearly harder on optimization.
Ultra Street Fighter IV
Frame data, matchups and option-selects form deep studied theory
Virtua Fighter 5: Final Showdown
Throw-tech rates, evade directions, and frame data are extensively studied
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.