head to head
Neither is simply harder - they are hard in different places. Portal 2 demands more execution; Rise of the Golden Idol demands more variance.

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

Optimization · Pure Optimization
A successor deduction game demanding systematic elimination across interconnected mystery tableaux.
Portal 2 leans Optimization (Pure Optimization); Rise of the Golden Idol leans Optimization (Pure Optimization).
Portal 2 leans clearly harder on execution.
Portal 2
Portal placement requires some precision but timing is lenient.
Rise of the Golden Idol
Interface identical to predecessor; no physical demands
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.
Rise of the Golden Idol
Scripted mystery scenes have no adaptive opponent
Rise of the Golden Idol leans clearly harder on variance.
Portal 2
Puzzles are deterministic with no randomness.
Rise of the Golden Idol
Hidden roles and motives form layered investigative uncertainty
Rise of the Golden Idol leans a little harder on optimization, though the gap is small.
Portal 2
Solving the puzzle's logic IS the entire game.
Rise of the Golden Idol
Closed-world deduction chain converges to exactly one correct answer per scene
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.