head to head
Neither is simply harder - they are hard in different places. StarCraft demands more optimization; Tekken 8 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 3D fighter where movement and mixup reads decide rounds.
StarCraft leans Optimization (Grand Arena); Tekken 8 leans Execution (Grand Arena).
Tekken 8 leans clearly harder on execution.
StarCraft
APM and micro control ceiling is huge
Tekken 8
Just-frame inputs and 3D movement punish sloppy hands.
Tekken 8 leans clearly harder on reads.
StarCraft
scouting and predicting human opponent builds
Tekken 8
Adaptive opponents mix lows, highs, and throws.
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 8
Negligible RNG in core matches.
StarCraft leans clearly harder on optimization.
StarCraft
build orders and economy are near-solvable
Tekken 8
Frame data, punishes, and movelist depth.
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.