head to head
vs
BoxBoxBoy!vsPortal 2
BoxBoxBoy! leans Optimization (Pure Optimization); Portal 2 leans Optimization (Pure Optimization).
BoxBoxBoy!Portal 2
Axis by axis
Execution2 vs 3
Portal 2 leans harder on execution: Portal placement requires some precision but timing is lenient.
Reads0 vs 0
Even - both lean on reads about the same.
Variance0 vs 0
Even - both lean on variance about the same.
Optimization9 vs 9
Even - both lean on optimization about the same.
Two games can score the same on an axis and still test it in very different ways - read each rationale, not just the number.