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

Optimization · Pure Optimization
A dwarven survival-crafting expedition where managing ore, gear and bases outweighs swordplay.
Borderlands leans Optimization (Practiced Mastery); The Lord of the Rings: Return to Moria leans Optimization (Pure Optimization).
Borderlands leans a little harder on execution, though the gap is small.
Borderlands
Standard FPS aim; numbers matter more than precision
The Lord of the Rings: Return to Moria
Stamina-based melee needs modest timing and positioning.
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
The Lord of the Rings: Return to Moria
Orc hordes are scripted spawns, not adaptive minds.
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
The Lord of the Rings: Return to Moria
Procedurally generated mines hide ore, dangers and routes.
The Lord of the Rings: Return to Moria leans a little harder on optimization, though the gap is small.
Borderlands
Builds, gear math, and farming routes dominate
The Lord of the Rings: Return to Moria
Base building, gear tiers and resource chains decide survival.
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.