head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is optimization, and it is a single point.

Optimization · Systems & Chaos
An open-town horror entry with dynamic rain that intensifies the otherworld.

Optimization · Pure Optimization
A 2D sandbox of procedurally generated planets driven by crafting progression.
Silent Hill: Downpour leans Optimization (Systems & Chaos); Starbound leans Optimization (Pure Optimization).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Silent Hill: Downpour
Improvised melee asks little mechanical skill
Starbound
Light platforming and combat, generous margins
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Silent Hill: Downpour
Enemies and the Void are scripted
Starbound
Procedural NPCs follow simple fixed behaviours
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Silent Hill: Downpour
Weather shifts and side quests hide information first run
Starbound
Procedural planets and loot keep early exploration unknown
Starbound leans a little harder on optimization, though the gap is small.
Silent Hill: Downpour
Routes, puzzles, and morality endings are solvable
Starbound
Gear tiers, farming, and progression routes dominate
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.