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
An off-road hauling simulator about planning routes and nursing heavy trucks through mud, ice and rivers.

Optimization · Practiced Mastery
The pioneering ninja stealth game of rooftop grappling and one-strike assassinations in feudal Japan.
SnowRunner leans Optimization (Practiced Mastery); Tenchu: Stealth Assassins 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.
SnowRunner
Throttle finesse and winch work prevent disasters.
Tenchu: Stealth Assassins
Grapple movement and stealth-kill timing
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
SnowRunner
No opponents; terrain is the only adversary.
Tenchu: Stealth Assassins
Guards patrol on fixed routes
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
SnowRunner
Mud and ice physics surprise until terrain is learned.
Tenchu: Stealth Assassins
Item drops and unseen layouts first run
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
SnowRunner
Truck loadouts, route planning and fuel logistics decide deliveries.
Tenchu: Stealth Assassins
Guard routes and Grand Master paths 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.