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 · Pure Optimization
Expanding a self-sufficient alien colony by solving atmosphere, power, and resource chains under scripted threats.

Optimization · Pure Optimization
An auto-battling deckbuilder about building a loop to defeat the Lich.
Aven Colony leans Optimization (Pure Optimization); Loop Hero 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.
Aven Colony
City management UI has no twitch dimension
Loop Hero
Autobattler, almost no inputs.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Aven Colony
Alien threats are scripted with no player-modelling behaviour
Loop Hero
Enemies follow scripts.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Aven Colony
Landing site resources and alien attack timing carry moderate RNG
Loop Hero
Card draws and loot drops randomize.
Loop Hero leans a little harder on optimization, though the gap is small.
Aven Colony
Colony expansion, air quality chains, and tech routing are the solvable core
Loop Hero
Deck and tile placement reward deep optimization.
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.