head to head
Breath of Fire IV asks more than Portal 2, and the gap is variance.

Optimization · Pure Optimization
A dual-protagonist JRPG where mastering cross-character fusion and combo optimization resolves all scripted encounters.

Optimization · Pure Optimization
A first-person puzzle game where seeing the solution is the whole skill.
Breath of Fire IV leans Optimization (Pure Optimization); Portal 2 leans Optimization (Pure Optimization).
Portal 2 leans a little harder on execution, though the gap is small.
Breath of Fire IV
Menu combat; combo system has minor sequencing
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.
Breath of Fire IV
No adaptive foes; all patterns are fixed
Portal 2
No opponent; puzzles are static.
Breath of Fire IV leans clearly harder on variance.
Breath of Fire IV
Random encounter variance and some enemy action randomness present
Portal 2
Puzzles are deterministic with no randomness.
Portal 2 leans a little harder on optimization, though the gap is small.
Breath of Fire IV
Cross-Ryu fusion, combo chains, and AP economy are the solvable layer
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.