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

Optimization · Pure Optimization
The 1986 original that founded the Japanese RPG template.

Optimization · Pure Optimization
Hoenn's definitive version, crowned by the strategy-heavy Battle Frontier.
Dragon Quest leans Optimization (Pure Optimization); Pokémon Emerald 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.
Dragon Quest
Menu commands only
Pokémon Emerald
Turn-based commands only
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Dragon Quest
No adaptive opposition
Pokémon Emerald
Battle Frontier AI is fixed-policy
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Dragon Quest
Battle RNG and unknown world first time
Pokémon Emerald
Encounter RNG and Frontier hax
Pokémon Emerald leans a little harder on optimization, though the gap is small.
Dragon Quest
Grind thresholds and routes are fully solvable
Pokémon Emerald
EVs, movesets, and Frontier strategy run deep
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.