head to head
The Settlers II: 10th Anniversary asks more than Portal 2, and the gap is reads.

Optimization · Pure Optimization
A first-person puzzle game where seeing the solution is the whole skill.

Optimization · Pure Optimization
Optimising road networks and production chains at a settler's pace.
Portal 2 leans Optimization (Pure Optimization); The Settlers II: 10th Anniversary leans Optimization (Pure Optimization).
Portal 2 leans a little harder on execution, though the gap is small.
Portal 2
Portal placement requires some precision but timing is lenient.
The Settlers II: 10th Anniversary
Slow road-laying needs no dexterity at all
The Settlers II: 10th Anniversary leans clearly harder on reads.
Portal 2
No opponent; puzzles are static.
The Settlers II: 10th Anniversary
AI opponents expand on predictable scripts
The Settlers II: 10th Anniversary leans clearly harder on variance.
Portal 2
Puzzles are deterministic with no randomness.
The Settlers II: 10th Anniversary
Map resources are scripted-but-unknown until explored
Portal 2 leans a little harder on optimization, though the gap is small.
Portal 2
Solving the puzzle's logic IS the entire game.
The Settlers II: 10th Anniversary
Road networks and production chains are 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.