head to head
Neither is simply harder - they are hard in different places. Portal 2 demands more optimization; Tangle Tower demands more variance.

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

Optimization · Pure Optimization
Cross-referencing hidden clues into deductions about a fixed murder mystery.
Portal 2 leans Optimization (Pure Optimization); Tangle Tower leans Optimization (Pure Optimization).
Portal 2 leans clearly harder on execution.
Portal 2
Portal placement requires some precision but timing is lenient.
Tangle Tower
Pointing and clicking, nothing physical
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.
Tangle Tower
Suspects are written characters, not adaptive minds
Tangle Tower leans clearly harder on variance.
Portal 2
Puzzles are deterministic with no randomness.
Tangle Tower
The murder's facts are hidden until clues surface
Portal 2 leans clearly harder on optimization.
Portal 2
Solving the puzzle's logic IS the entire game.
Tangle Tower
Cross-referencing clues into deductions is the test
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.