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

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

Optimization · Practiced Mastery
Methodically mapping a hostile station where knowledge and routing beat reflexes.
SnowRunner leans Optimization (Practiced Mastery); System Shock 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.
System Shock
Combat and cyberspace ask competent but dated reflexes
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.
System Shock
SHODAN's threats are scripted, not an adapting mind
System Shock leans a little harder on variance, though the gap is small.
SnowRunner
Mud and ice physics surprise until terrain is learned.
System Shock
Citadel's layout and logs are hidden until uncovered
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.
System Shock
Inventory, routing and station knowledge solve the game
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.