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 · Pure Optimization
A sci-fi mystery that splits across thirteen protagonists' stories, backed by light real-time strategy battles.

Optimization · Pure Optimization
A cheerful farming-sim sequel about ranching alien slimes for profit.
13 Sentinels: Aegis Rim leans Optimization (Pure Optimization); Slime Rancher 2 leans Optimization (Pure Optimization).
Slime Rancher 2 leans a little harder on execution, though the gap is small.
13 Sentinels: Aegis Rim
Real-time strategy battles have light unit-control inputs
Slime Rancher 2
light movement and vacuum-aim execution
Slime Rancher 2 leans a little harder on reads, though the gap is small.
13 Sentinels: Aegis Rim
Kaiju wave patterns are scripted per stage
Slime Rancher 2
no adaptive opposition, solo farming sim
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
13 Sentinels: Aegis Rim
Hidden story order and mystery connections obscure the full picture
Slime Rancher 2
slime spawn and behavior randomness minor
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
13 Sentinels: Aegis Rim
Optimising battle chip builds and unlocking all story segments is the mechanical layer
Slime Rancher 2
ranch layout and economy optimization 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.