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.

Variance · Systems & Chaos
Careful descent through procedural depths balancing survival systems against permadeath.

Optimization · Practiced Mastery
Side-scrolling roguelike where item synergies snowball against a relentless difficulty clock.
Below leans Variance (Systems & Chaos); Risk of Rain leans Optimization (Practiced Mastery).
Risk of Rain leans a little harder on execution, though the gap is small.
Below
Stamina-based combat punishes sloppy dodges and swings
Risk of Rain
Dodging projectiles and platforming under scaling pressure.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Below
Creatures and the Darkness follow rules, not minds
Risk of Rain
Enemies spawn and chase; no adaptation.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Below
Procedural floors, traps and loot reshape every descent
Risk of Rain
Item drops and stage rolls dominate run identity.
Risk of Rain leans a little harder on optimization, though the gap is small.
Below
Survival crafting and trap knowledge converge with experience
Risk of Rain
Item stacking and time-pressure routing is 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.