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 subversive JRPG where understanding rolling HP mechanics and PSI optimization defeats its quirky scripted encounters.

Optimization · Pure Optimization
Building a team and exploiting type-matchup math against scripted trainers.
EarthBound leans Optimization (Pure Optimization); Pokémon LeafGreen Version leans Optimization (Pure Optimization).
EarthBound leans a little harder on execution, though the gap is small.
EarthBound
Rolling HP meter has very mild timing implication
Pokémon LeafGreen Version
Menu-driven turn battles demand no physical skill
Pokémon LeafGreen Version leans a little harder on reads, though the gap is small.
EarthBound
All enemies scripted with fixed attack patterns
Pokémon LeafGreen Version
Trainers are scripted; link battles are a side mode
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
EarthBound
PSI randomness, enemy attack variety, and encounter triggers add unpredictability
Pokémon LeafGreen Version
Wild encounters, catch rolls and crits add mappable RNG
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
EarthBound
Status effects, rolling HP strategy, and Franklin Badge usage are solvable
Pokémon LeafGreen Version
Type matchups and team building are the solvable core
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.