head to head
Neither is simply harder - they are hard in different places. Portal 2 demands more execution; World Basketball Manager 2010 demands more variance.

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

Optimization · Pure Optimization
A basketball management sim of rosters and tactics.
Portal 2 leans Optimization (Pure Optimization); World Basketball Manager 2010 leans Optimization (Pure Optimization).
Portal 2 leans clearly harder on execution.
Portal 2
Portal placement requires some precision but timing is lenient.
World Basketball Manager 2010
no direct physical input
World Basketball Manager 2010 leans a little harder on reads, though the gap is small.
Portal 2
No opponent; puzzles are static.
World Basketball Manager 2010
AI GMs follow modeled patterns
World Basketball Manager 2010 leans clearly harder on variance.
Portal 2
Puzzles are deterministic with no randomness.
World Basketball Manager 2010
match sim rolls and injuries
Portal 2 leans a little harder on optimization, though the gap is small.
Portal 2
Solving the puzzle's logic IS the entire game.
World Basketball Manager 2010
roster building and tactics dominate
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.