head to head
Neither is simply harder - they are hard in different places. Portal 2 demands more execution; Yes, Your Grace demands more variance.

Optimization · Pure Optimization
A first-person puzzle game where seeing the solution is the whole skill.

Optimization · Pure Optimization
A kingdom-management narrative where you ration gold and favors as a beleaguered king.
Portal 2 leans Optimization (Pure Optimization); Yes, Your Grace leans Optimization (Pure Optimization).
Portal 2 leans clearly harder on execution.
Portal 2
Portal placement requires some precision but timing is lenient.
Yes, Your Grace
Menu choices only
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Portal 2
No opponent; puzzles are static.
Yes, Your Grace
Petitioners are scripted, not adaptive
Yes, Your Grace leans clearly harder on variance.
Portal 2
Puzzles are deterministic with no randomness.
Yes, Your Grace
Outcomes of choices hidden on first run
Portal 2 leans clearly harder on optimization.
Portal 2
Solving the puzzle's logic IS the entire game.
Yes, Your Grace
Resource budgeting across known story beats is solvable
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.