head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Optimization · Practiced Mastery
The original loot-driven co-op shooter set on the bandit world of Pandora.

Optimization · Practiced Mastery
Co-op survival testing resource discipline and routes under randomised item spawns.
Borderlands leans Optimization (Practiced Mastery); No More Room in Hell leans Optimization (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Borderlands
Standard FPS aim; numbers matter more than precision
No More Room in Hell
Scarce-ammo headshots and melee spacing under pressure
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Borderlands
Bandits and skags are scripted
No More Room in Hell
Zombies shamble on scripts without modelling players
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Borderlands
Procedural loot drops gate your power
No More Room in Hell
Dynamic objectives and random item spawns reshuffle each run
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Borderlands
Builds, gear math, and farming routes dominate
No More Room in Hell
Route knowledge, resource discipline and teamwork are the real edge
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.