Building comparison
head to head
Diablo IIvsX-COM: UFO Defense
Neither is meaningfully harder - they pose close to the same test. The widest gap is execution, and it is a single point.
Diablo II
Optimization · Pure Optimization
The genre-defining loot ARPG whose builds, runes, and trade economy players still optimize decades later.
X-COM: UFO Defense
Optimization · Systems & Chaos
Seminal 1994 strategy game mixing global base management with brutal turn-based alien squad combat.
Diablo II leans Optimization (Pure Optimization); X-COM: UFO Defense leans Optimization (Systems & Chaos).
Diablo IIX-COM: UFO Defense
Axis by axis
Execution2 vs 1
Diablo II leans a little harder on execution, though the gap is small.
Diablo II
Positioning and potion reflexes, little else physical
X-COM: UFO Defense
Turn-based; only inventory clicking
Reads0 vs 0
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Diablo II
Monster AI is fully mappable
X-COM: UFO Defense
Alien AI is scripted, never adaptive
Variance6 vs 6
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Diablo II
Loot RNG and random maps drive the grind
X-COM: UFO Defense
Hit rolls, random maps, and unseen aliens punish constantly
Optimization9 vs 8
Diablo II leans a little harder on optimization, though the gap is small.
Diablo II
Builds, breakpoints, rune economy, magic-find routing are the game
X-COM: UFO Defense
Base economy, research order, and tactical doctrine are masterable
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.