Hi SUJAYS,
Entity framework is ORM Model, which used LINQ to access database and code is auto generated whereas ADO.Net code is larger than Entity Framework.
The main and the only benefit of Entity framework is it auto-generates code for the Model (middle layer), Data Access Layer and mapping code, thus reducing a lot of development time.
Entity Framework is a wrapper for ADO.NET. There is nearly no difference between those two in performance (maybe Entity framework is bit slower).
But ADO.Net is faster than Entity framework as Entity framework uses ADO.Net in background.
What you use depends totally on your preference.
For more details refer below links.
Entity Framework overview
ADO.NET vs entity framework performance
