stylistic:style_transfer, linguistic:translation
Similarities and influences

Despite Shankara's criticism of certain schools of Mahayana Buddhism, Shankara's philosophy shows strong similarities with the Mahayana Buddhist philosophy which he attacks. According to S.N. Dasgupta,

Shankara and his followers borrowed much of their dialectic form of criticism from the Buddhists. His Brahman was very much like the sunya of Nagarjuna The debts of Shankara to the self-luminosity of the Vijnanavada Buddhism can hardly be overestimated. There seems to be much truth in the accusations against Shankara by Vijnana Bhiksu and others that he was a hidden Buddhist himself. I am led to think that Shankara's philosophy is largely a compound of Vijnanavada and Sunyavada Buddhism with the Upanisad notion of the permanence of self superadded.

According to Mudgal, Shankara's Advaita and the Buddhist Madhyamaka view of ultimate reality are compatible because they are both transcendental, indescribable, non-dual and only arrived at through a via negativa (neti neti). Mudgal concludes therefore that

... the difference between Sunyavada (Mahayana) philosophy of Buddhism and Advaita philosophy of Hinduism may be a matter of emphasis, not of kind.

Some Hindu scholars criticized Advaita for its Maya and non-theistic doctrinal similarities with Buddhism. Ramanuja, the founder of Vishishtadvaita Vedānta, accused Adi Shankara of being a Prachanna Bauddha, that is, a "crypto-Buddhist", and someone who was undermining theistic Bhakti devotionalism. The non-Advaita scholar Bhaskara of the Bhedabheda Vedānta tradition, similarly around 800 CE, accused Shankara's Advaita as "this despicable broken down Mayavada that has been chanted by the Mahayana Buddhists", and a school that is undermining the ritual duties set in Vedic orthodoxy.