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 break-and-boost JRPG carried by job-routing and party-composition planning.

Optimization · Pure Optimization
Team-building optimisation against fixed trainers with mapped RNG.
Octopath Traveler leans Optimization (Pure Optimization); Pokémon Ruby Version leans Optimization (Pure Optimization).
Octopath Traveler leans a little harder on execution, though the gap is small.
Octopath Traveler
Turn-based, no input demand
Pokémon Ruby Version
Turn selection requires no dexterity
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Octopath Traveler
Scripted enemies
Pokémon Ruby Version
Scripted trainers never adapt to your strategy
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Octopath Traveler
Hit, crit, and break rolls
Pokémon Ruby Version
Encounter, catch and crit rolls are quickly mapped
Octopath Traveler leans a little harder on optimization, though the gap is small.
Octopath Traveler
Job, break-boost, party routing deeply rewarded
Pokémon Ruby Version
Abilities and natures deepen an already solvable type system
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.