head to head
Neither is simply harder - they are hard in different places. Motorsport Manager Mobile 2 demands more reads; Portal 2 demands more execution.

Optimization · Pure Optimization
A racing management sim of car development and live pit strategy.

Optimization · Pure Optimization
A first-person puzzle game where seeing the solution is the whole skill.
Motorsport Manager Mobile 2 leans Optimization (Pure Optimization); Portal 2 leans Optimization (Pure Optimization).
Portal 2 leans clearly harder on execution.
Motorsport Manager Mobile 2
No driving - pure strategy, zero twitch
Portal 2
Portal placement requires some precision but timing is lenient.
Motorsport Manager Mobile 2 leans clearly harder on reads.
Motorsport Manager Mobile 2
Predicting rival pit and tire strategy mid-race
Portal 2
No opponent; puzzles are static.
Motorsport Manager Mobile 2 leans clearly harder on variance.
Motorsport Manager Mobile 2
Weather, reliability and incidents add randomness
Portal 2
Puzzles are deterministic with no randomness.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Motorsport Manager Mobile 2
Car development, pit strategy and economy are the game
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.