head to head
LimbovsSemblance
Limbo leans Execution (Practiced Mastery); Semblance leans Optimization (Practiced Mastery).
LimboSemblance
Axis by axis
Execution5 vs 4
Limbo leans harder on execution: Tight platforming with trial-and-error.
Reads0 vs 0
Even - both lean on reads about the same.
Variance1 vs 1
Even - both lean on variance about the same.
Optimization5 vs 6
Semblance leans harder on optimization: Seeing how to reshape terrain to solve each screen is the test
Two games can score the same on an axis and still test it in very different ways - read each rationale, not just the number.

