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
American trucking sim about long hauls and growth.

Optimization · Pure Optimization
A crafting life-sim about running a workshop in a post-apocalyptic town.
American Truck Simulator leans Optimization (Pure Optimization); My Time at Portia leans Optimization (Pure Optimization).
American Truck Simulator leans a little harder on execution, though the gap is small.
American Truck Simulator
Truck handling and trailer parking
My Time at Portia
Light combat and crafting timing.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
American Truck Simulator
No adaptive opponents
My Time at Portia
NPCs follow scripts.
My Time at Portia leans a little harder on variance, though the gap is small.
American Truck Simulator
Traffic and weather variance
My Time at Portia
Loot and gifts vary.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
American Truck Simulator
Fleet, garages, route economics
My Time at Portia
Workshop scheduling and commissions reward optimization.
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.