head to head
Vampire: The Masquerade - Bloodlines asks more than Portal, and the gap is variance.

Optimization · Pure Optimization
The portal-gun puzzle game whose solutions are everything.

Optimization · Pure Optimization
A cult-classic vampire RPG won by discipline choice and skill-check routing.
Portal leans Optimization (Pure Optimization); Vampire: The Masquerade - Bloodlines leans Optimization (Pure Optimization).
Portal leans a little harder on execution, though the gap is small.
Portal
Portal placement timing modest.
Vampire: The Masquerade - Bloodlines
Janky hybrid combat, low demand
Vampire: The Masquerade - Bloodlines leans a little harder on reads, though the gap is small.
Portal
No adversary modeling player.
Vampire: The Masquerade - Bloodlines
Scripted NPCs
Vampire: The Masquerade - Bloodlines leans clearly harder on variance.
Portal
Deterministic chambers; no randomness.
Vampire: The Masquerade - Bloodlines
Hidden dice under skill checks
Portal leans a little harder on optimization, though the gap is small.
Portal
Pure puzzle-solving optimization.
Vampire: The Masquerade - Bloodlines
Discipline, feeding, build routing central
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.