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

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 high-execution 3D fighter where reading opponent tendencies and optimising punishment routes defines top play.
Street Fighter III: 3rd Strike leans Reads (Competitive PvP); Tekken 7 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
Tekken 7
Long combo strings and just-frames demand high motor precision
Street Fighter III: 3rd Strike leans a little harder on reads, though the gap is small.
Street Fighter III: 3rd Strike
Parry is a pure real-time read against an adapting human - the defining mechanic
Tekken 7
Reading opponent's defensive tendencies and rage art timing is constant
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
Tekken 7
No RNG; all information is visible in the match
Tekken 7 leans a little harder on optimization, though the gap is small.
Street Fighter III: 3rd Strike
Super Art selection and character punish routing are well-studied
Tekken 7
Rage Art/Drive usage, wall carry routes, and frame data heavily 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.