Julie Lerman Blog - Mike Pizzo on LINQ to SQL vs. Entity Framework

 

Here are some highlights from Mike's reply:

• LINQ to SQL is targeted more toward rapidly developing applications against your existing Microsoft SQL Server schema, while the Entity Framework provides object- and storage-layer access to Microsoft SQL Server and 3^rd party databases through a loosely coupled, flexible mapping to existing relational schema.
• LINQ to SQL has features targeting "Rapid Development" against a Microsoft SQL Server database.
• The Entity Framework has features targeting "Enterprise Scenarios". 
• The Entity Framework is more than LINQ to Entities; it includes a "storage layer" that lets you use the same conceptual application model through low-level ADO.NET Data Provider interfaces using Entity SQL, and efficiently stream results as possibly hierarchical/polymorphic DataReaders, saving the overhead of materializing objects for read-only scenarios where there is no additional business logic. 

Source: Julie Lerman Blog - Mike Pizzo on LINQ to SQL vs. Entity Framework