head to head
Lands of Lore: The Throne of Chaos asks more than Portal, and the gap is variance.

Optimization · Pure Optimization
A real-time dungeon crawler mixing light combat reflexes with puzzle and inventory mastery.

Optimization · Pure Optimization
The portal-gun puzzle game whose solutions are everything.
Lands of Lore: The Throne of Chaos leans Optimization (Pure Optimization); Portal leans Optimization (Pure Optimization).
Portal leans a little harder on execution, though the gap is small.
Lands of Lore: The Throne of Chaos
Real-time clicking and dodge-stepping in corridors.
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.
Lands of Lore: The Throne of Chaos
Monsters charge on simple scripts.
Portal
No adversary modeling player.
Lands of Lore: The Throne of Chaos leans clearly harder on variance.
Lands of Lore: The Throne of Chaos
Hidden switches, traps, and item rolls.
Portal
Deterministic chambers; no randomness.
Portal leans a little harder on optimization, though the gap is small.
Lands of Lore: The Throne of Chaos
Inventory, leveling, and dungeon routing carry progress.
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.