head to head
Neither is simply harder - they are hard in different places. Pendragon demands more variance; Portal 2 demands more execution.

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

Optimization · Pure Optimization
A first-person puzzle game where seeing the solution is the whole skill.
Pendragon leans Optimization (Pure Optimization); Portal 2 leans Optimization (Pure Optimization).
Portal 2 leans clearly harder on execution.
Pendragon
Moving pieces on a grid has no twitch demand
Portal 2
Portal placement requires some precision but timing is lenient.
Pendragon leans clearly harder on reads.
Pendragon
Enemy AI is tactical but not deeply adaptive to you
Portal 2
No opponent; puzzles are static.
Pendragon leans clearly harder on variance.
Pendragon
Procedural encounters and outcomes add randomness
Portal 2
Puzzles are deterministic with no randomness.
Portal 2 leans clearly harder on optimization.
Pendragon
Positioning, narrative choices and tactical planning win runs
Portal 2
Solving the puzzle's logic IS the entire game.
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.