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
Seminal 1994 strategy game mixing global base management with brutal turn-based alien squad combat.

Optimization · Systems & Chaos
The cult PS1 card game where memorising obscure fusions beats grinding for drops.
X-COM: UFO Defense leans Optimization (Systems & Chaos); Yu-Gi-Oh! Forbidden Memories leans Optimization (Systems & Chaos).
X-COM: UFO Defense leans a little harder on execution, though the gap is small.
X-COM: UFO Defense
Turn-based; only inventory clicking
Yu-Gi-Oh! Forbidden Memories
Menu-driven duels
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
X-COM: UFO Defense
Alien AI is scripted, never adaptive
Yu-Gi-Oh! Forbidden Memories
AI opponents are fully mappable
Yu-Gi-Oh! Forbidden Memories leans a little harder on variance, though the gap is small.
X-COM: UFO Defense
Hit rolls, random maps, and unseen aliens punish constantly
Yu-Gi-Oh! Forbidden Memories
Card drops and draws gate everything
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
X-COM: UFO Defense
Base economy, research order, and tactical doctrine are masterable
Yu-Gi-Oh! Forbidden Memories
Memorising fusion combinations is the real game
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.