The great bust on the south wall of Cave 1 stands about seven metres high in basalt. In the reading most scholars accept, from Stella Kramrisch, the right face is Vamadeva or Uma, feminine and creative, holding a lotus bud; the left is Aghora or Bhairava, the moustached destroyer; the centre is Tatpurusha, who holds the positive and negative principles in balance. Carmel Berkson sees compassion and wisdom in the heads. Wikipedia's own Trimurti article calls the piece a Shaiva statement of Shiva's aspects rather than three gods.
The University of Mumbai's Sanskrit department goes a step further than Kramrisch: the bust is five-faced Sadashiva, two faces hidden in the rock, and the central face should be labelled Sadashiva rather than Tatpurusha.
What is different here:
Five faces rather than three; a different name for the central face.
Guidebooks and a UNESCO description treat the three faces as Brahma, Vishnu and Shiva, noting that the calm central face resembles Vishnu the preserver. This is the reading most visitors arrive with.
What is different here:
Three different gods rather than three aspects of one; the caption rule for the site is 'Sadashiva (often popularly called Trimurti)'.