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

Optimization · Pure Optimization
Lineup optimisation and deploy timing against fixed stages, gated by gacha luck.
Pokémon Moon leans Optimization (Pure Optimization); The Battle Cats leans Optimization (Pure Optimization).
The Battle Cats leans a little harder on execution, though the gap is small.
Pokémon Moon
Turn-based menus require no dexterity
The Battle Cats
Tapping deploy buttons with timing, minimal dexterity
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 Battle Cats
Enemy waves are fixed per stage
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 Battle Cats
Gacha rolls gate which cats you even own
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Pokémon Moon
Team composition and type math are the solvable core
The Battle Cats
Lineup building and deploy timing solve each stage
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.