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

Optimization · Pure Optimization
Budgeting steam movement and loadouts against hidden but scripted alien positions.

Optimization · Pure Optimization
Action-leaning Pokémon spinoff about catching in real time across ancient Hisui.
Code Name S.T.E.A.M. leans Optimization (Pure Optimization); Pokémon Legends: Arceus 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.
Code Name S.T.E.A.M.
Manual third-person aiming adds a real but small hands layer
Pokémon Legends: Arceus
Real-time dodging, sneaking, and aimed throws
Code Name S.T.E.A.M. leans a little harder on reads, though the gap is small.
Code Name S.T.E.A.M.
Alien AI runs fixed behaviours, never modelling you
Pokémon Legends: Arceus
Wild and boss behavior is scripted
Code Name S.T.E.A.M. leans a little harder on variance, though the gap is small.
Code Name S.T.E.A.M.
Unseen enemy positions and overwatch threats are hidden information
Pokémon Legends: Arceus
Spawn tables and outbreak randomness
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Code Name S.T.E.A.M.
Steam budgeting, loadouts and positioning are the solvable core
Pokémon Legends: Arceus
Research tasks and agile-strong style choices reward planning
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.