Brahma Vidya is the knowledge of Brahman. Sri Vidya is the knowledge of The Goddess. Both are considered to be the same.
The Paramatman represented, through the Pranava -OM – in Brahma Vidya, is represented by the seed sound “hrim” in Sri Vidya.
The seed (bija) mantra “hrim” is called Maya bijam or Bhuvaneshvari bijam. Just as the Tree, the flower, and the fruit, emerge from the seed, so also do the three different aspects of The Devi – namely, MahaKali, MahaLakshmi, and MahaSaraswati Emerge from the seed mantra “hrim”.