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

Execution · Grand Arena
The battle royale archetype: loot, rotate, and outlast 99 opponents inside a shrinking circle.

Execution · Grand Arena
Real-time strategy where hands, reads, and build optimization all matter at the top.
PlayerUnknown's Battlegrounds leans Execution (Grand Arena); StarCraft II: Wings of Liberty leans Execution (Grand Arena).
StarCraft II: Wings of Liberty leans clearly harder on execution.
PlayerUnknown's Battlegrounds
Recoil control and long-range ballistics
StarCraft II: Wings of Liberty
APM, macro, micro-control under pressure
StarCraft II: Wings of Liberty leans clearly harder on reads.
PlayerUnknown's Battlegrounds
99 humans rotating and ambushing adaptively
StarCraft II: Wings of Liberty
1v1 ladder vs adaptive humans modeling you
PlayerUnknown's Battlegrounds leans clearly harder on variance.
PlayerUnknown's Battlegrounds
Loot spawns and circle placement shape every match
StarCraft II: Wings of Liberty
map spawns minor; mostly known
StarCraft II: Wings of Liberty leans clearly harder on optimization.
PlayerUnknown's Battlegrounds
Zone rotations and positioning theory are learnable
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.