head to head
Neither is simply harder - they are hard in different places. StarCraft demands more optimization; The King of Fighters XV 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 refined KOF entry that lowers the execution bar slightly while preserving the team-order reads and punish game.
StarCraft leans Optimization (Grand Arena); The King of Fighters XV leans Execution (Grand Arena).
The King of Fighters XV leans a little harder on execution, though the gap is small.
StarCraft
APM and micro control ceiling is huge
The King of Fighters XV
Shatter Strike and MAX Mode combos demand practiced precise inputs
The King of Fighters XV leans clearly harder on reads.
StarCraft
scouting and predicting human opponent builds
The King of Fighters XV
Team order choices and opponent habit exploitation remain central
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
The King of Fighters XV
No RNG; all information is visible in the match
StarCraft leans clearly harder on optimization.
StarCraft
build orders and economy are near-solvable
The King of Fighters XV
Team construction and MAX Mode routing reward study
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.