head to head
Neither is simply harder - they are hard in different places. StarCraft demands more optimization; Tekken 7 demands more reads.

Optimization · Grand Arena
A real-time strategy classic where perfected build orders and mechanical speed decide most matches.

Execution · Grand Arena
A high-execution 3D fighter where reading opponent tendencies and optimising punishment routes defines top play.
StarCraft leans Optimization (Grand Arena); Tekken 7 leans Execution (Grand Arena).
Tekken 7 leans clearly harder on execution.
StarCraft
APM and micro control ceiling is huge
Tekken 7
Long combo strings and just-frames demand high motor precision
Tekken 7 leans clearly harder on reads.
StarCraft
scouting and predicting human opponent builds
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.
StarCraft
minimal hidden info beyond fog of war
Tekken 7
No RNG; all information is visible in the match
StarCraft leans clearly harder on optimization.
StarCraft
build orders and economy are near-solvable
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.