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

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

Optimization · Pure Optimization
The portal-gun puzzle game whose solutions are everything.
Desta: The Memories Between leans Optimization (Pure Optimization); Portal leans Optimization (Pure Optimization).
Portal leans clearly harder on execution.
Desta: The Memories Between
turn-based, no reflex component
Portal
Portal placement timing modest.
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
No adversary modeling player.
Desta: The Memories Between leans clearly harder on variance.
Desta: The Memories Between
minor randomness in tactical encounters
Portal
Deterministic chambers; no randomness.
Portal leans clearly harder on optimization.
Desta: The Memories Between
tactics-lite positioning and party building matter
Portal
Pure puzzle-solving optimization.
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.