head to head
Neither is simply harder - they are hard in different places. Pendragon demands more variance; Portal demands more execution.

Optimization · Pure Optimization
A narrative turn-based tactics game testing positioning and choices across a procedural journey.

Optimization · Pure Optimization
The portal-gun puzzle game whose solutions are everything.
Pendragon leans Optimization (Pure Optimization); Portal leans Optimization (Pure Optimization).
Portal leans clearly harder on execution.
Pendragon
Moving pieces on a grid has no twitch demand
Portal
Portal placement timing modest.
Pendragon leans clearly harder on reads.
Pendragon
Enemy AI is tactical but not deeply adaptive to you
Portal
No adversary modeling player.
Pendragon leans clearly harder on variance.
Pendragon
Procedural encounters and outcomes add randomness
Portal
Deterministic chambers; no randomness.
Portal leans a little harder on optimization, though the gap is small.
Pendragon
Positioning, narrative choices and tactical planning win runs
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.