head to head
Neither is simply harder - they are hard in different places. Portal 2 demands more execution; Telling Lies demands more variance.

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

Optimization · Pure Optimization
A fragmented surveillance drama where keyword searches and clip assembly reconstruct a hidden story.
Portal 2 leans Optimization (Pure Optimization); Telling Lies leans Optimization (Pure Optimization).
Portal 2 leans clearly harder on execution.
Portal 2
Portal placement requires some precision but timing is lenient.
Telling Lies
Search-and-playback interface demands no motor skill
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.
Telling Lies
Pre-recorded footage has no adaptive component
Telling Lies leans clearly harder on variance.
Portal 2
Puzzles are deterministic with no randomness.
Telling Lies
Non-linear fragmented footage obscures the timeline and relationships
Portal 2 leans clearly harder on optimization.
Portal 2
Solving the puzzle's logic IS the entire game.
Telling Lies
Methodical keyword search and clip ordering reconstructs the hidden narrative
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.