head to head
Neither is simply harder - they are hard in different places. Papers, Please demands more execution; Return of the Obra Dinn demands more optimization.

Optimization · Pure Optimization
Dystopian border-checkpoint sim where stamping passports fast enough feeds your family.

Optimization · Pure Optimization
A pure deduction puzzle with a single solvable answer set.
Papers, Please leans Optimization (Pure Optimization); Return of the Obra Dinn leans Optimization (Pure Optimization).
Papers, Please leans clearly harder on execution.
Papers, Please
Document-checking speed directly pays the rent
Return of the Obra Dinn
No mechanical execution required
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Papers, Please
Entrants are generated, not adaptive opponents
Return of the Obra Dinn
Static scenes, no opponent
Papers, Please leans clearly harder on variance.
Papers, Please
Random entrant documents and scripted-event surprises
Return of the Obra Dinn
Fully deterministic puzzle
Return of the Obra Dinn leans clearly harder on optimization.
Papers, Please
Internalizing rulebooks and inspection workflow efficiency
Return of the Obra Dinn
Pure deductive logic on a fixed manifest
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.