head to head
Neither is simply harder - they are hard in different places. Desta: The Memories Between demands more variance; Portal 2 demands more optimization.

Optimization · Pure Optimization
A narrative tactics game blending life-sim storytelling with lightweight tactical battles.

Optimization · Pure Optimization
A first-person puzzle game where seeing the solution is the whole skill.
Desta: The Memories Between leans Optimization (Pure Optimization); Portal 2 leans Optimization (Pure Optimization).
Portal 2 leans clearly harder on execution.
Desta: The Memories Between
turn-based, no reflex component
Portal 2
Portal placement requires some precision but timing is lenient.
Desta: The Memories Between leans a little harder on reads, though the gap is small.
Desta: The Memories Between
AI opponents follow fixed tactical logic
Portal 2
No opponent; puzzles are static.
Desta: The Memories Between leans clearly harder on variance.
Desta: The Memories Between
minor randomness in tactical encounters
Portal 2
Puzzles are deterministic with no randomness.
Portal 2 leans clearly harder on optimization.
Desta: The Memories Between
tactics-lite positioning and party building matter
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.