head to head
PlayerUnknown's Battlegrounds asks more than Sea of Thieves, and the gap is variance.

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

Reads · Competitive PvP
Open-world pirate game with PvPvE ship combat.
PlayerUnknown's Battlegrounds leans Execution (Grand Arena); Sea of Thieves leans Reads (Competitive PvP).
PlayerUnknown's Battlegrounds leans a little harder on execution, though the gap is small.
PlayerUnknown's Battlegrounds
Recoil control and long-range ballistics
Sea of Thieves
Ship sailing and naval gunnery require hands
Sea of Thieves leans a little harder on reads, though the gap is small.
PlayerUnknown's Battlegrounds
99 humans rotating and ambushing adaptively
Sea of Thieves
PvP ship fights are pure mind games
PlayerUnknown's Battlegrounds leans clearly harder on variance.
PlayerUnknown's Battlegrounds
Loot spawns and circle placement shape every match
Sea of Thieves
Server encounters, weather, loot vary
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
PlayerUnknown's Battlegrounds
Zone rotations and positioning theory are learnable
Sea of Thieves
Routes, loadouts, ship setups 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.