head to head
Space Rangers 2: Dominators asks more than Portal 2, and the gap is variance.

Optimization · Pure Optimization
A first-person puzzle game where seeing the solution is the whole skill.

Optimization · Pure Optimization
A sprawling space RPG-strategy hybrid where mastering trade, upgrades, and fleet building trumps everything else.
Portal 2 leans Optimization (Pure Optimization); Space Rangers 2: Dominators leans Optimization (Pure Optimization).
Portal 2 leans a little harder on execution, though the gap is small.
Portal 2
Portal placement requires some precision but timing is lenient.
Space Rangers 2: Dominators
real-time combat pauses, minimal twitch skill needed
Space Rangers 2: Dominators leans a little harder on reads, though the gap is small.
Portal 2
No opponent; puzzles are static.
Space Rangers 2: Dominators
no adaptive human opponent in single-player sandbox
Space Rangers 2: Dominators leans clearly harder on variance.
Portal 2
Puzzles are deterministic with no randomness.
Space Rangers 2: Dominators
random encounters, text quests, galaxy generation
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Portal 2
Solving the puzzle's logic IS the entire game.
Space Rangers 2: Dominators
deep economy, tech tree, fleet build all solvable
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.