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 · Practiced Mastery
A PSP-born GTA prequel adding a business empire system to 1984 Vice City.

Optimization · Practiced Mastery
An off-road hauling simulator about planning routes and nursing heavy trucks through mud, ice and rivers.
Grand Theft Auto: Vice City Stories leans Optimization (Practiced Mastery); SnowRunner 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.
Grand Theft Auto: Vice City Stories
Driving, aiming, and helicopter handling on a stick
SnowRunner
Throttle finesse and winch work prevent disasters.
Grand Theft Auto: Vice City Stories leans a little harder on reads, though the gap is small.
Grand Theft Auto: Vice City Stories
Mission enemies are scripted and predictable
SnowRunner
No opponents; terrain is the only adversary.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Grand Theft Auto: Vice City Stories
Mostly fixed missions with light traffic randomness
SnowRunner
Mud and ice physics surprise until terrain is learned.
SnowRunner leans a little harder on optimization, though the gap is small.
Grand Theft Auto: Vice City Stories
Empire-building business system layers economy onto missions
SnowRunner
Truck loadouts, route planning and fuel logistics decide deliveries.
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.