head to head
Neither is simply harder - they are hard in different places. Danganronpa V3: Killing Harmony demands more variance; Portal 2 demands more execution.

Optimization · Pure Optimization
The most mechanically varied Danganronpa trial system, wrapping a meta-narrative puzzle about fiction and truth.

Optimization · Pure Optimization
A first-person puzzle game where seeing the solution is the whole skill.
Danganronpa V3: Killing Harmony leans Optimization (Pure Optimization); Portal 2 leans Optimization (Pure Optimization).
Portal 2 leans clearly harder on execution.
Danganronpa V3: Killing Harmony
New Debate Scrum and other trial modes add mild timing
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.
Danganronpa V3: Killing Harmony
Culprits are predetermined; no adaptive deduction layer
Portal 2
No opponent; puzzles are static.
Danganronpa V3: Killing Harmony leans clearly harder on variance.
Danganronpa V3: Killing Harmony
Truth Bullets and hidden evidence shape trial uncertainty
Portal 2
Puzzles are deterministic with no randomness.
Portal 2 leans clearly harder on optimization.
Danganronpa V3: Killing Harmony
Mastering all trial minigames and argument logic is the optimisable path
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.