head to head
Neither is simply harder - they are hard in different places. Front Mission 4 demands more variance; Portal 2 demands more execution.

Optimization · Pure Optimization
Tactical mecha RPG where customizing wanzer parts and link systems outweighs battlefield improvisation.

Optimization · Pure Optimization
A first-person puzzle game where seeing the solution is the whole skill.
Front Mission 4 leans Optimization (Pure Optimization); Portal 2 leans Optimization (Pure Optimization).
Portal 2 leans clearly harder on execution.
Front Mission 4
Menu-driven turn-based combat
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.
Front Mission 4
Fixed mission AI with set behaviors
Portal 2
No opponent; puzzles are static.
Front Mission 4 leans clearly harder on variance.
Front Mission 4
Accuracy rolls and link-attack triggers
Portal 2
Puzzles are deterministic with no randomness.
Portal 2 leans a little harder on optimization, though the gap is small.
Front Mission 4
Wanzer part builds and pilot skill loadouts are the game
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.