Question: Difference Between Krishna and Vishnu
Please explain me how Krishna and Vishnu are different?
Answer: God at Home and God at the Office
Vishnu or Vishnu-tattva is the category of the Supreme Personality of Godhead in all of His multifarious forms such as Krishna, Rama, Nrsimha, Vamana, Mahavishnu, etc. This is differentiated from the category known as Jiva-tattva, which is the category we are in as the Lord's separated parts and parcels. Therefore Krishna is the original Vishnu and the other forms of God as His expansions. When God is at home engaged in dealings with His intimate family members He is Krishna. And when He is engaged in managing universal cosmic affairs, He is Vishnu.