head to head
Borderlands 2 asks more than Sunless Sea, and the gap is execution.

Optimization · Systems & Chaos
Loot-shooter RPG built on gear chasing.

Variance · Systems & Chaos
A gothic exploration roguelike about sailing an underground ocean, trading terror for stories and profit.
Borderlands 2 leans Optimization (Systems & Chaos); Sunless Sea leans Variance (Systems & Chaos).
Borderlands 2 leans clearly harder on execution.
Borderlands 2
Aim matters but generous hit feel
Sunless Sea
Slow boat combat barely tests the hands
Borderlands 2 leans a little harder on reads, though the gap is small.
Borderlands 2
Enemies are scripted loot fodder
Sunless Sea
Horrors are scripted or random, never adaptive
Sunless Sea leans a little harder on variance, though the gap is small.
Borderlands 2
Procedurally generated weapon drops vary
Sunless Sea
Hidden map, random events and unknown story branches dominate
Borderlands 2 leans clearly harder on optimization.
Borderlands 2
Skill trees and gear math heavily solved
Sunless Sea
Trade routes and fuel math converge once mapped
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.