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
Building a team and exploiting type-matchup math against scripted trainers.

Optimization · Systems & Chaos
Managing an unreliable police roster against random calls and solvable tactics.
Pokémon LeafGreen Version leans Optimization (Pure Optimization); This Is the Police 2 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 LeafGreen Version
Menu-driven turn battles demand no physical skill
This Is the Police 2
Menu management and slow tactical turns need no dexterity
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Pokémon LeafGreen Version
Trainers are scripted; link battles are a side mode
This Is the Police 2
Story actors and criminals are scripted
This Is the Police 2 leans a little harder on variance, though the gap is small.
Pokémon LeafGreen Version
Wild encounters, catch rolls and crits add mappable RNG
This Is the Police 2
Call outcomes and officer quirks roll unpredictably
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Pokémon LeafGreen Version
Type matchups and team building are the solvable core
This Is the Police 2
Roster management, dispatch triage and tactical positioning are solvable
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.