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 · Practiced Mastery
Co-op first-person zombie RPG about improvised weapons on a resort island.

Optimization · Practiced Mastery
Episodic survival horror pairing scarce-resource tension with co-op character switching.
Dead Island leans Optimization (Practiced Mastery); Resident Evil Revelations 2 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.
Dead Island
first-person melee timing and stamina
Resident Evil Revelations 2
Aiming under pressure and dodge timing against enemies.
Resident Evil Revelations 2 leans a little harder on reads, though the gap is small.
Dead Island
zombies are scripted swarms
Resident Evil Revelations 2
Scripted enemies and co-op partner; no adaptive opposition.
Resident Evil Revelations 2 leans a little harder on variance, though the gap is small.
Dead Island
weapon drops and spawns add noise
Resident Evil Revelations 2
First-run scares, unknown layouts, raid mode loot rolls.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Dead Island
weapon mods and skill builds carry late game
Resident Evil Revelations 2
Resource routing, enemy spawn knowledge, episode mastery once mapped.
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.