There is proved that the Hochschild cohomology algebras of finitedimensional self-injective -algebras over a field are invariants of stable equivalences of Morita type.
Zygmunt POGORZALY. "Invariance of Hochschild cohomology algebras under stable equivalences of Morita type." J. Math. Soc. Japan 53 (4) 913 - 918, October, 2001. https://doi.org/10.2969/jmsj/05340913