Most of the time any “anti-revisionist” that denounces the DPRK will also denounce Cuba. There are some that support the DPRK but not Cuba because Cuba is much laxer with markets than the DPRK. Since Cuba’s industry isn’t as self-sufficient as the DPRK’s, the economy requires markets for foreign investment and to fill the gaps of the state sector. This alone will turn many “anti-revisionists” away from even critical support of Cuba. DPRK’s markets meanwhile were much more limited in scope; in my personal experience if a Maoist is calling the DPRK revisionist it’s mostly due to the Juche ideology rather than the markets.

By the way, the DPRK does allow foreign investment, though it does so very carefully: