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

Optimization · Pure Optimization
Growing a floating base by solving resource chains and research order against scripted ocean threats.

Optimization · Pure Optimization
A first-person farming game about wrangling adorable slimes for plorts.
Raft leans Optimization (Pure Optimization); Slime Rancher 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.
Raft
Shark hook-attacks require minimal timing
Slime Rancher
Vacuum aiming is gentle.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Raft
Shark and seagull AI are scripted with no player modelling
Slime Rancher
Slimes follow scripted behaviors.
Raft leans a little harder on variance, though the gap is small.
Raft
Island loot tables and resource drift introduce randomness
Slime Rancher
Plort prices and slime spawns vary.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Raft
Raft expansion, food chains, and research order are solvable systems
Slime Rancher
Ranch layout and economy reward planning.
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.