head to head
Borderlands 2 asks more than Slay the Spire, and the gap is execution.

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

Optimization · Systems & Chaos
A deckbuilding roguelike where adapting builds to random offers wins runs.
Borderlands 2 leans Optimization (Systems & Chaos); Slay the Spire leans Optimization (Systems & Chaos).
Borderlands 2 leans clearly harder on execution.
Borderlands 2
Aim matters but generous hit feel
Slay the Spire
Turn-based, zero input precision required.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Borderlands 2
Enemies are scripted loot fodder
Slay the Spire
Enemy intents shown; behaviour scripted, not adaptive.
Slay the Spire leans a little harder on variance, though the gap is small.
Borderlands 2
Procedurally generated weapon drops vary
Slay the Spire
Card and relic offers drive every run.
Slay the Spire leans a little harder on optimization, though the gap is small.
Borderlands 2
Skill trees and gear math heavily solved
Slay the Spire
Deck shaping and combat math are 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.