head to head
Neither is simply harder - they are hard in different places. Blood Bowl 2 demands more variance; StarCraft demands more execution.

Variance · Grand Arena
Turn-based fantasy football where orcs, elves, and dice decide the league.

Optimization · Grand Arena
A real-time strategy classic where perfected build orders and mechanical speed decide most matches.
Blood Bowl 2 leans Variance (Grand Arena); StarCraft leans Optimization (Grand Arena).
StarCraft leans clearly harder on execution.
Blood Bowl 2
Turn-based tactics; no reflex demand
StarCraft
APM and micro control ceiling is huge
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Blood Bowl 2
PvP positioning baits opponents into bad dice commitments
StarCraft
scouting and predicting human opponent builds
Blood Bowl 2 leans clearly harder on variance.
Blood Bowl 2
Block dice and failed pickups decide entire matches
StarCraft
minimal hidden info beyond fog of war
StarCraft leans a little harder on optimization, though the gap is small.
Blood Bowl 2
Risk-ordering actions and team development are deep solvable craft
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.