  Two Heegaard Floer knot complexes are called stably equivalent if an acyclic
complex can be added to each complex to make them filtered chain homotopy
equivalent. Hom showed that if two knots are concordant, then their knot
complexes are stably equivalent. Invariants of stable equivalence include the
concordance invariants $\tau$, $\varepsilon$, and $\Upsilon$. Feller and
Krcatovich gave a relationship between the Upsilon invariants of torus knots.
We use secondary Upsilon invariants defined by Kim and Livingston to show that
these relations do not extend to stable equivalence.
