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.

Variance · Systems & Chaos
Tests mapping unknown level rules that converge to walkthroughs once learned.

Optimization · Systems & Chaos
Isolating targets amid randomised crowds using traps and patience.
Escape the Backrooms leans Variance (Systems & Chaos); Party Hard leans Optimization (Systems & Chaos).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Escape the Backrooms
Sneaking and sprinting from entities is undemanding
Party Hard
Walking and stabbing need timing but little dexterity
Escape the Backrooms leans a little harder on reads, though the gap is small.
Escape the Backrooms
Entities are scripted or random, not adaptive minds
Party Hard
Partygoers wander on RNG, not adaptive minds
Escape the Backrooms leans a little harder on variance, though the gap is small.
Escape the Backrooms
Unknown level rules and entity behaviour dominate first runs
Party Hard
Random traps, events and witness behaviour vary each level
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Escape the Backrooms
Each level's escape converges to a known walkthrough
Party Hard
Trap usage and isolation tactics converge to known strategies
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.