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

Optimization · Pure Optimization
A third-person roguelike where item snowballs outscale the difficulty timer.

Optimization · Pure Optimization
An immersive-sim RPG demanding intricate build optimisation and resource management aboard a hostile alien-infested starship.
Risk of Rain 2 leans Optimization (Pure Optimization); System Shock 2 leans Optimization (Pure Optimization).
System Shock 2 leans a little harder on execution, though the gap is small.
Risk of Rain 2
Aim and movement matter under escalating swarm pressure.
System Shock 2
Weapon degradation and limited stats moderate the raw aim ceiling
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Risk of Rain 2
Enemies follow fixed AI; no opponent models you.
System Shock 2
All enemies are scripted with fixed patrol and attack routines
Risk of Rain 2 leans a little harder on variance, though the gap is small.
Risk of Rain 2
Item drops and stage selection randomized each run.
System Shock 2
Random loot locations and psi powers introduce run-to-run variance
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Risk of Rain 2
Item stacking and scaling routes dominate run outcomes.
System Shock 2
Deep build tree and resource conservation define the entire skill ceiling
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.