head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is reads, and it is a single point.

Optimization · Systems & Chaos
An ARPG loot grind about chasing affix rolls to feed a damage-stack build.

Optimization · Pure Optimization
Using stealth-phase positioning to construct optimal ambushes against scripted patrols.
Diablo IV leans Optimization (Systems & Chaos); Mutant Year Zero: Road to Eden leans Optimization (Pure Optimization).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Diablo IV
Clicking and dodging are light; gear carries you.
Mutant Year Zero: Road to Eden
Stealth positioning before combat demands spatial precision
Mutant Year Zero: Road to Eden leans a little harder on reads, though the gap is small.
Diablo IV
Enemies and bosses are scripted; no adaptive opponent.
Mutant Year Zero: Road to Eden
Enemies patrol fixed routes; no adaptive opponent modeling
Diablo IV leans a little harder on variance, though the gap is small.
Diablo IV
Loot rolls, affixes, and uniques drive every session.
Mutant Year Zero: Road to Eden
Hit chances and mutation procs introduce meaningful RNG
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Diablo IV
Paragon, aspects, and damage buckets are solvable theorycraft.
Mutant Year Zero: Road to Eden
Stalker trait loadouts and pre-combat positioning are tight optimization puzzles
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.