head to head
Lock's Quest asks more than Portal, and the gap is variance.

Optimization · Pure Optimization
A tower-defense RPG hybrid about building defenses against scripted waves.

Optimization · Pure Optimization
The portal-gun puzzle game whose solutions are everything.
Lock's Quest leans Optimization (Pure Optimization); Portal leans Optimization (Pure Optimization).
Portal leans a little harder on execution, though the gap is small.
Lock's Quest
Some action moments but building dominates
Portal
Portal placement timing modest.
Lock's Quest leans a little harder on reads, though the gap is small.
Lock's Quest
Clockwork horde follows fixed waves, not adaptive
Portal
No adversary modeling player.
Lock's Quest leans clearly harder on variance.
Lock's Quest
Enemy waves are largely predictable
Portal
Deterministic chambers; no randomness.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Lock's Quest
Turret placement and defensive engineering is the game
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.