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
Nemesis-system sequel that adds orc army management and fortress sieges.

Optimization · Pure Optimization
A dwarven survival-crafting expedition where managing ore, gear and bases outweighs swordplay.
Middle-earth: Shadow of War leans Optimization (Practiced Mastery); The Lord of the Rings: Return to Moria leans Optimization (Pure Optimization).
Middle-earth: Shadow of War leans a little harder on execution, though the gap is small.
Middle-earth: Shadow of War
Same counter-heavy combat as its predecessor
The Lord of the Rings: Return to Moria
Stamina-based melee needs modest timing and positioning.
Middle-earth: Shadow of War leans a little harder on reads, though the gap is small.
Middle-earth: Shadow of War
Nemesis system mimics adaptation but follows knowable rules
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.
Middle-earth: Shadow of War
Random orc traits, betrayals, and fortress compositions
The Lord of the Rings: Return to Moria
Procedurally generated mines hide ore, dangers and routes.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Middle-earth: Shadow of War
Army building and siege planning layer on top
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.