head to head
Neither is simply harder - they are hard in different places. Devil Summoner: Soul Hackers demands more variance; Portal 2 demands more execution.

Optimization · Pure Optimization
Cyberpunk dungeon crawler where managing demon loyalty and fusion charts beats the digital city.

Optimization · Pure Optimization
A first-person puzzle game where seeing the solution is the whole skill.
Devil Summoner: Soul Hackers leans Optimization (Pure Optimization); Portal 2 leans Optimization (Pure Optimization).
Portal 2 leans clearly harder on execution.
Devil Summoner: Soul Hackers
First-person menu battles only.
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.
Devil Summoner: Soul Hackers
Demon personalities are scripted archetypes, not adaptive.
Portal 2
No opponent; puzzles are static.
Devil Summoner: Soul Hackers leans clearly harder on variance.
Devil Summoner: Soul Hackers
Loyalty system and negotiation RNG cause real swings.
Portal 2
Puzzles are deterministic with no randomness.
Portal 2 leans a little harder on optimization, though the gap is small.
Devil Summoner: Soul Hackers
Fusion planning and personality management are solvable layers.
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.