head to head
Neither is simply harder - they are hard in different places. PUBG Mobile demands more variance; StarCraft II: Wings of Liberty demands more optimization.

Execution · Grand Arena
Battle royale survival blending aim, rotation planning, and heavy circle-and-loot RNG.

Execution · Grand Arena
Real-time strategy where hands, reads, and build optimization all matter at the top.
PUBG Mobile leans Execution (Grand Arena); StarCraft II: Wings of Liberty leans Execution (Grand Arena).
StarCraft II: Wings of Liberty leans clearly harder on execution.
PUBG Mobile
Touchscreen aim and recoil control set the ceiling
StarCraft II: Wings of Liberty
APM, macro, micro-control under pressure
StarCraft II: Wings of Liberty leans clearly harder on reads.
PUBG Mobile
Outguessing rotations and third-party timing of human squads
StarCraft II: Wings of Liberty
1v1 ladder vs adaptive humans modeling you
PUBG Mobile leans clearly harder on variance.
PUBG Mobile
Circle placement, loot and drop locations dominate single matches
StarCraft II: Wings of Liberty
map spawns minor; mostly known
StarCraft II: Wings of Liberty leans clearly harder on optimization.
PUBG Mobile
Zone rotation theory and loadout priorities are well mapped
StarCraft II: Wings of Liberty
build orders, economy curves heavily solved
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.