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.

Variance · Systems & Chaos
A stealth horror where an unpredictable hunter forces hidden-information play.

Variance · Systems & Chaos
A co-op horror about scavenging scrap on hostile moons for a quota.
Alien: Isolation leans Variance (Systems & Chaos); Lethal Company leans Variance (Systems & Chaos).
Lethal Company leans a little harder on execution, though the gap is small.
Alien: Isolation
Stealth movement, low mechanical bar
Lethal Company
Movement and aim matter under pressure.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Alien: Isolation
Alien has heuristics but doesn't truly model you
Lethal Company
Other players coordinate, but enemies scripted.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Alien: Isolation
Alien's director behavior is hidden and unpredictable
Lethal Company
Moon layouts and monster spawns randomize.
Lethal Company leans a little harder on optimization, though the gap is small.
Alien: Isolation
Resource crafting and route planning help survive
Lethal Company
Quota routing and loadouts reward planning.
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.