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
Building ball-fusion synergies and base upgrades to outscale randomized hordes.

Optimization · Systems & Chaos
An ARPG loot grind about chasing affix rolls to feed a damage-stack build.
Ball x Pit leans Optimization (Systems & Chaos); Diablo IV leans Optimization (Systems & Chaos).
Ball x Pit leans a little harder on execution, though the gap is small.
Ball x Pit
Aiming volleys and dodging matters but stays forgiving
Diablo IV
Clicking and dodging are light; gear carries you.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Ball x Pit
Monster hordes follow patterns, nothing adapts
Diablo IV
Enemies and bosses are scripted; no adaptive opponent.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Ball x Pit
Ball and upgrade rolls shape every run
Diablo IV
Loot rolls, affixes, and uniques drive every session.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Ball x Pit
Fusion recipes and base building reward solved synergies
Diablo IV
Paragon, aspects, and damage buckets are solvable theorycraft.
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.