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 · Practiced Mastery
Progressing through a contaminated open world by solving its scenario tech tree and optimising base builds.

Optimization · Practiced Mastery
Remake of the original Risk of Rain with new survivors and tighter action.
Once Human leans Optimization (Practiced Mastery); Risk of Rain Returns leans Optimization (Practiced Mastery).
Risk of Rain Returns leans a little harder on execution, though the gap is small.
Once Human
Third-person shooting and dodge rolls require real aim and timing
Risk of Rain Returns
Platforming and aiming demand sharper inputs than original.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Once Human
Deviant creatures follow scripted attack patterns only
Risk of Rain Returns
Scripted enemy behaviour throughout.
Risk of Rain Returns leans a little harder on variance, though the gap is small.
Once Human
Deviant spawn composition and loot tables carry meaningful randomness
Risk of Rain Returns
Random item pool defines builds run to run.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Once Human
Scenario tech tree, base construction, and gear crafting are solvable
Risk of Rain Returns
Survivor kits and routing reward optimization.
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.