head to head
vs
Portal 2vsWhere's My Water?
Portal 2 leans Optimization (Pure Optimization); Where's My Water? leans Optimization (Pure Optimization).
Portal 2Where's My Water?
Axis by axis
Execution3 vs 3
Even - both lean on execution about the same.
Reads0 vs 0
Even - both lean on reads about the same.
Variance0 vs 1
Where's My Water? leans harder on variance: Physics wobble barely matters; levels are fixed.
Optimization9 vs 8
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.