Q: What is the difference between the cosmic Divine and the Mother?
It is a matter of realisation. In the Yoga of the Gita the Cosmic Divine is realised as Vasudeva (Krishna). The Vaishnavas realise it as Vishnu, the Shaivas as Shiva, the Tantrics (Shaktas) realise the Devi (Goddess) as the Cosmic and even as the Transcendent Divine.
– Sri Aurobindo