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 · Systems & Chaos
Blizzard's mobile Diablo where loot RNG and paid gem systems drive character power.

Optimization · Systems & Chaos
Skill-active survivors-like with curse stacking and boss-rush escalation.
Diablo Immortal leans Optimization (Systems & Chaos); Soulstone Survivors leans Optimization (Systems & Chaos).
Soulstone Survivors leans a little harder on execution, though the gap is small.
Diablo Immortal
Touch-friendly combat with dodge timing
Soulstone Survivors
Active skills and dodging beyond auto-attack.
Diablo Immortal leans a little harder on reads, though the gap is small.
Diablo Immortal
PvP battlegrounds exist but gear usually decides
Soulstone Survivors
Scripted enemy waves.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Diablo Immortal
Legendary gem and loot RNG, heavily monetized
Soulstone Survivors
Skill and curse drops swing builds.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Diablo Immortal
Resonance, paragon, set optimization dominate power
Soulstone Survivors
Curses and build crafting reward planning.
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.