head to head
Crush the Castle asks more than Portal, and the gap is variance.

Optimization · Pure Optimization
A physics puzzle game testing projectile angle and aim to demolish castles.

Optimization · Pure Optimization
The portal-gun puzzle game whose solutions are everything.
Crush the Castle leans Optimization (Pure Optimization); Portal 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.
Crush the Castle
Release timing of the trebuchet needs some precision
Portal
Portal placement timing modest.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Crush the Castle
Solo physics puzzle, no opponent to predict
Portal
No adversary modeling player.
Crush the Castle leans clearly harder on variance.
Crush the Castle
Deterministic physics, minimal randomness
Portal
Deterministic chambers; no randomness.
Portal leans a little harder on optimization, though the gap is small.
Crush the Castle
Finding optimal projectile angles to topple structures is core
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.