head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Optimization · Pure Optimization
A 2D sandbox of procedurally generated planets driven by crafting progression.

Optimization · Pure Optimization
Managing a survivor community's economy and defenses after the collapse.
Starbound leans Optimization (Pure Optimization); Survivalist 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.
Starbound
Light platforming and combat, generous margins
Survivalist
Top-down combat needs only modest aim and kiting
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Starbound
Procedural NPCs follow simple fixed behaviours
Survivalist
NPC factions follow systemic scripts, not adaptation
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Starbound
Procedural planets and loot keep early exploration unknown
Survivalist
Scavenging finds and event triggers are hidden until explored
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Starbound
Gear tiers, farming, and progression routes dominate
Survivalist
Community building, farming and trade economy are the solvable core
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.