Question

what is the difference between banaras and varanasi

Answer 1

Yes, These names do refer to the same city Varansi also called as Banaras and Kashi. It is a city of Uttar Pradesh situated near Bihar border, in theeastern part of Uttar Pradesh. ... Now, name Varanasi itself is interpreted to be derived from combination of 'Varuna' and 'Asi' on the name of rivers.

Answer 2

Nothing, Varanasi also known as Banaras or Kashi .
It is the city of Utter Pradesh near Bihar border in the eastern part of Utter Pradesh.