head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Optimization · Practiced Mastery
A punishing Soviet off-road logging sim about dragging timber through near-impassable mud.

Optimization · Practiced Mastery
An off-road hauling simulator about planning routes and nursing heavy trucks through mud, ice and rivers.
MudRunner 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.
MudRunner
Careful throttle, diff-lock and winch control matter constantly.
SnowRunner
Throttle finesse and winch work prevent disasters.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
MudRunner
No opponent of any kind.
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.
MudRunner
Deforming mud behaves unpredictably until mapped.
SnowRunner
Mud and ice physics surprise until terrain is learned.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
MudRunner
Fuel, load and route planning across the map is the core test.
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.