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 · Pure Optimization
A notoriously difficult comedy adventure where Rincewind the inept wizard must rid Ankh-Morpork of a dragon.

Optimization · Systems & Chaos
A search-based detective game piecing together police interview footage.
Discworld leans Optimization (Pure Optimization); Her Story 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.
Discworld
Point-and-click; no manual ceiling.
Her Story
Typing search terms only.
Her Story leans a little harder on reads, though the gap is small.
Discworld
Ankh-Morpork's citizens are scripted gag dispensers.
Her Story
Subject is recorded, not adaptive.
Her Story leans a little harder on variance, though the gap is small.
Discworld
Infamously obscure puzzle logic blindsides every first-timer.
Her Story
Hidden clips revealed by guessed keywords.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Discworld
Byzantine item chains are brutal but fully solvable.
Her Story
Efficient search strategy reconstructs the case.
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.