head to head
Portal 2 asks more than Obduction, and the gap is execution.

Optimization · Pure Optimization
A Myst-successor puzzle adventure about decoding alien machinery across spliced worlds.

Optimization · Pure Optimization
A first-person puzzle game where seeing the solution is the whole skill.
Obduction leans Optimization (Pure Optimization); Portal 2 leans Optimization (Pure Optimization).
Portal 2 leans clearly harder on execution.
Obduction
Walking and clicking only
Portal 2
Portal placement requires some precision but timing is lenient.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Obduction
No opponents at all
Portal 2
No opponent; puzzles are static.
Obduction leans a little harder on variance, though the gap is small.
Obduction
Deterministic alien machinery
Portal 2
Puzzles are deterministic with no randomness.
Portal 2 leans clearly harder on optimization.
Obduction
Number-system and swap-machine puzzles are fully solvable
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.