head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is execution, and it is a single point.

Execution · Grand Arena
Early battle royale where scavenged loot and shrinking gas decide 150-player brawls.

Reads · Competitive PvP
Open-world pirate game with PvPvE ship combat.
H1Z1 leans Execution (Grand Arena); Sea of Thieves leans Reads (Competitive PvP).
H1Z1 leans a little harder on execution, though the gap is small.
H1Z1
Gunfights and vehicle control decide duels
Sea of Thieves
Ship sailing and naval gunnery require hands
Sea of Thieves leans a little harder on reads, though the gap is small.
H1Z1
Outguessing human rotations and pushes
Sea of Thieves
PvP ship fights are pure mind games
H1Z1 leans a little harder on variance, though the gap is small.
H1Z1
Loot spawns and gas circles randomise runs
Sea of Thieves
Server encounters, weather, loot vary
Sea of Thieves leans a little harder on optimization, though the gap is small.
H1Z1
Drop spots, loot routes, and zone play
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.