head to head
Portal 2 asks more than LEGO Batman: The Videogame, and the gap is optimization.

Optimization · Pure Optimization
Co-op LEGO brawler where unlocking the right character to grab every collectible is the game.

Optimization · Pure Optimization
A first-person puzzle game where seeing the solution is the whole skill.
LEGO Batman: The Videogame leans Optimization (Pure Optimization); Portal 2 leans Optimization (Pure Optimization).
Portal 2 leans a little harder on execution, though the gap is small.
LEGO Batman: The Videogame
Button-mashy combat with no real fail state
Portal 2
Portal placement requires some precision but timing is lenient.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
LEGO Batman: The Videogame
Scripted goons and bosses
Portal 2
No opponent; puzzles are static.
LEGO Batman: The Videogame leans a little harder on variance, though the gap is small.
LEGO Batman: The Videogame
Stud and brick locations fixed
Portal 2
Puzzles are deterministic with no randomness.
Portal 2 leans clearly harder on optimization.
LEGO Batman: The Videogame
Character-ability gating drives collectible completion
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.