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

Optimization · Pure Optimization
Team building and type-matchup optimization through a scripted island campaign.

Optimization · Systems & Chaos
A fairy-tale adventure testing patient discovery of fixed puzzle solutions.
Pokémon Moon leans Optimization (Pure Optimization); The Night of the Rabbit leans Optimization (Systems & Chaos).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Pokémon Moon
Turn-based menus require no dexterity
The Night of the Rabbit
Pointing and clicking has no motor ceiling
Pokémon Moon leans a little harder on reads, though the gap is small.
Pokémon Moon
Scripted trials and trainers; competitive play is a niche mode
The Night of the Rabbit
No opponent of any kind to predict
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Pokémon Moon
Encounter tables, catch rolls and crits are mappable RNG
The Night of the Rabbit
Puzzle solutions are hidden information until discovered
Pokémon Moon leans a little harder on optimization, though the gap is small.
Pokémon Moon
Team composition and type math are the solvable core
The Night of the Rabbit
A walkthrough trivialises it - puzzles have fixed solutions
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.