head to head
Incredipede asks more than Portal 2, and the gap is variance.

Optimization · Pure Optimization
A physics puzzle game testing creature-design ingenuity to traverse obstacles.

Optimization · Pure Optimization
A first-person puzzle game where seeing the solution is the whole skill.
Incredipede leans Optimization (Pure Optimization); Portal 2 leans Optimization (Pure Optimization).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Incredipede
Some control of the creature but design dominates
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.
Incredipede
No opponent to model
Portal 2
No opponent; puzzles are static.
Incredipede leans clearly harder on variance.
Incredipede
Physics behaves consistently once understood
Portal 2
Puzzles are deterministic with no randomness.
Portal 2 leans a little harder on optimization, though the gap is small.
Incredipede
Designing limb structures to solve physics puzzles
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.