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

Execution · Grand Arena
A 2D fighting game where execution meets relentless yomi at neutral.

Execution · Grand Arena
A tag-team 3D fighter layering team optimization onto Tekken's execution and reads core.
Street Fighter 6 leans Execution (Grand Arena); Tekken Tag Tournament leans Execution (Grand Arena).
Street Fighter 6 leans a little harder on execution, though the gap is small.
Street Fighter 6
Frame-perfect inputs and combos are mandatory.
Tekken Tag Tournament
Tag combos and netsu juggles demand precise inputs
Street Fighter 6 leans a little harder on reads, though the gap is small.
Street Fighter 6
Adaptive opponent baits Drive Impacts and throws.
Tekken Tag Tournament
Tag timing adds another layer of human mind-games
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Street Fighter 6
Essentially no randomness in match outcomes.
Tekken Tag Tournament
Open information; nothing hidden between rounds
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Street Fighter 6
Matchup charts, frame data, and combo routes.
Tekken Tag Tournament
Team synergy and tag combo routing are optimizable systems
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.