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.

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

Optimization · Systems & Chaos
A survivors-like testing build synergy stacking against randomised upgrade offers.
Borderlands 2 leans Optimization (Systems & Chaos); Megabonk leans Optimization (Systems & Chaos).
Borderlands 2 leans a little harder on execution, though the gap is small.
Borderlands 2
Aim matters but generous hit feel
Megabonk
Dodging dense hordes takes positioning but not twitch aim
Borderlands 2 leans a little harder on reads, though the gap is small.
Borderlands 2
Enemies are scripted loot fodder
Megabonk
Hordes mindlessly converge on you
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Borderlands 2
Procedurally generated weapon drops vary
Megabonk
Item and upgrade rolls shape every run's build
Borderlands 2 leans a little harder on optimization, though the gap is small.
Borderlands 2
Skill trees and gear math heavily solved
Megabonk
Stacking synergistic upgrades into broken builds is the loop
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.