head to head
Risk of Rain Returns asks more than Zenless Zone Zero, and the gap is variance.

Optimization · Practiced Mastery
Remake of the original Risk of Rain with new survivors and tighter action.

Optimization · Practiced Mastery
A stylish urban gacha action RPG mixing combo combat with character-pull economies.
Risk of Rain Returns leans Optimization (Practiced Mastery); Zenless Zone Zero 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.
Risk of Rain Returns
Platforming and aiming demand sharper inputs than original.
Zenless Zone Zero
Parry timing, dodge counters, assist-switch combos
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Risk of Rain Returns
Scripted enemy behaviour throughout.
Zenless Zone Zero
Enemy patterns are scripted, not adaptive
Risk of Rain Returns leans clearly harder on variance.
Risk of Rain Returns
Random item pool defines builds run to run.
Zenless Zone Zero
Gacha pulls and disc-drive substats gate power
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Risk of Rain Returns
Survivor kits and routing reward optimization.
Zenless Zone Zero
Team synergy, rotation theory, and stat optimisation dominate endgame
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.