head to head
vs
Portal 2vsTrine
Portal 2 leans Optimization (Pure Optimization); Trine leans Optimization (Pure Optimization).
Portal 2Trine
Axis by axis
Execution3 vs 4
Trine leans harder on execution: Physics platforming and wizard-box stacking need dexterity
Reads0 vs 0
Even - both lean on reads about the same.
Variance0 vs 1
Trine leans harder on variance: Levels are static and fully visible
Optimization9 vs 7
Portal 2 leans harder on optimization: Solving the puzzle's logic IS the entire game.
Two games can score the same on an axis and still test it in very different ways - read each rationale, not just the number.