head to head
Neither is simply harder - they are hard in different places. Out of the Park Baseball 20 demands more variance; Portal 2 demands more execution.

Optimization · Pure Optimization
A baseball management sim testing roster-building and statistical optimization over long seasons.

Optimization · Pure Optimization
A first-person puzzle game where seeing the solution is the whole skill.
Out of the Park Baseball 20 leans Optimization (Pure Optimization); Portal 2 leans Optimization (Pure Optimization).
Portal 2 leans clearly harder on execution.
Out of the Park Baseball 20
No physical input; you manage, not play
Portal 2
Portal placement requires some precision but timing is lenient.
Out of the Park Baseball 20 leans clearly harder on reads.
Out of the Park Baseball 20
AI GMs don't deeply model and adapt to you
Portal 2
No opponent; puzzles are static.
Out of the Park Baseball 20 leans clearly harder on variance.
Out of the Park Baseball 20
Player performance and injuries carry real randomness
Portal 2
Puzzles are deterministic with no randomness.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Out of the Park Baseball 20
Roster construction, scouting, and strategy are the entire game
Portal 2
Solving the puzzle's logic IS the entire game.
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.