head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is optimization, and it is a single point.

Optimization · Pure Optimization
Relaxing trucking sim with company-building progression.

Optimization · Practiced Mastery
An open-world crime game where managing a criminal empire's territory is the deeper system.
Euro Truck Simulator 2 leans Optimization (Pure Optimization); The Godfather II leans Optimization (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Euro Truck Simulator 2
Truck handling, parking, gear control
The Godfather II
shooting and brawling need moderate skill
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Euro Truck Simulator 2
No adaptive opponents
The Godfather II
scripted rival families, no adaptation
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Euro Truck Simulator 2
Traffic, weather, cargo conditions
The Godfather II
territory events and drops vary
Euro Truck Simulator 2 leans a little harder on optimization, though the gap is small.
Euro Truck Simulator 2
Company growth, route, fleet management
The Godfather II
empire management and territory control solvable
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.