head to head
Neither is simply harder - they are hard in different places. Smite demands more variance; StarCraft demands more optimization.

Execution · Grand Arena
A third-person MOBA where skillshot aim meets MOBA mind games.

Optimization · Grand Arena
A real-time strategy classic where perfected build orders and mechanical speed decide most matches.
Smite leans Execution (Grand Arena); StarCraft leans Optimization (Grand Arena).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Smite
Third-person skillshots raise the aim floor.
StarCraft
APM and micro control ceiling is huge
Smite leans a little harder on reads, though the gap is small.
Smite
Jungle invades and ganks require opponent modeling.
StarCraft
scouting and predicting human opponent builds
Smite leans clearly harder on variance.
Smite
Buff timers and minor RNG only.
StarCraft
minimal hidden info beyond fog of war
StarCraft leans clearly harder on optimization.
Smite
Builds, relics, and rotations are theorycrafted.
StarCraft
build orders and economy are near-solvable
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.