head to head
Arcanum: Of Steamworks and Magick Obscura asks more than Portal 2, and the gap is variance.

Optimization · Pure Optimization
A Victorian-era RPG where the magic-versus-tech split and schematic mastery reward deep system optimization.

Optimization · Pure Optimization
A first-person puzzle game where seeing the solution is the whole skill.
Arcanum: Of Steamworks and Magick Obscura leans Optimization (Pure Optimization); Portal 2 leans Optimization (Pure Optimization).
Portal 2 leans a little harder on execution, though the gap is small.
Arcanum: Of Steamworks and Magick Obscura
Real-time mode is optional; turn-based eliminates all twitch
Portal 2
Portal placement requires some precision but timing is lenient.
Arcanum: Of Steamworks and Magick Obscura leans a little harder on reads, though the gap is small.
Arcanum: Of Steamworks and Magick Obscura
All NPCs and factions follow scripted dialogue and combat routines
Portal 2
No opponent; puzzles are static.
Arcanum: Of Steamworks and Magick Obscura leans clearly harder on variance.
Arcanum: Of Steamworks and Magick Obscura
Hidden technology diagrams and faction reaction thresholds create exploration unknowns
Portal 2
Puzzles are deterministic with no randomness.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Arcanum: Of Steamworks and Magick Obscura
Magic versus technology stat split and schematic discovery are deeply optimizable
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.