head to head
Tekken 7 asks more than Street Fighter X Tekken, and the gap is reads.

Execution · Grand Arena
A tag-team crossover fighter pitting Street Fighter's cast against Tekken's under Capcom rules.

Execution · Grand Arena
A high-execution 3D fighter where reading opponent tendencies and optimising punishment routes defines top play.
Street Fighter X Tekken leans Execution (Grand Arena); Tekken 7 leans Execution (Grand Arena).
Tekken 7 leans a little harder on execution, though the gap is small.
Street Fighter X Tekken
Tag combos and juggle timing demand practiced hands
Tekken 7
Long combo strings and just-frames demand high motor precision
Tekken 7 leans clearly harder on reads.
Street Fighter X Tekken
Human mixups and tag baits require adaptation
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 X Tekken
Deterministic aside from negligible elements
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 X Tekken
Gem loadouts and team synergy add a builder layer
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.