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.

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

Optimization · Practiced Mastery
Off-road simulator about hauling lumber through brutally deformable Russian mud.
Papers, Please leans Optimization (Pure Optimization); Spintires leans Optimization (Practiced Mastery).
Spintires leans a little harder on execution, though the gap is small.
Papers, Please
Document-checking speed directly pays the rent
Spintires
Throttle finesse and winching through mud need careful hands
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
Spintires
No opponents
Papers, Please leans a little harder on variance, though the gap is small.
Papers, Please
Random entrant documents and scripted-event surprises
Spintires
Terrain deforms dynamically; fuel and routes uncertain until scouted
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Papers, Please
Internalizing rulebooks and inspection workflow efficiency
Spintires
Route choice, fuel logistics, and vehicle selection decide success
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.