head to head
Neither is simply harder - they are hard in different places. Portal 2 demands more execution; The Hundred Line: Last Defense Academy demands more variance.

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

Optimization · Pure Optimization
Tactical action-point puzzles threaded through a branching hidden-truth narrative.
Portal 2 leans Optimization (Pure Optimization); The Hundred Line: Last Defense Academy leans Optimization (Pure Optimization).
Portal 2 leans clearly harder on execution.
Portal 2
Portal placement requires some precision but timing is lenient.
The Hundred Line: Last Defense Academy
Turn-based tactics and reading require no dexterity
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Portal 2
No opponent; puzzles are static.
The Hundred Line: Last Defense Academy
Monsters and classmates follow authored scripts
The Hundred Line: Last Defense Academy leans clearly harder on variance.
Portal 2
Puzzles are deterministic with no randomness.
The Hundred Line: Last Defense Academy
Route branches and story twists are hidden information to uncover
Portal 2 leans clearly harder on optimization.
Portal 2
Solving the puzzle's logic IS the entire game.
The Hundred Line: Last Defense Academy
Action-point puzzles and route planning are the solvable spine
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.