Once a while I hear some known ASP.NET developer declaring that they quit developing in .NET and moving to Ruby using Ruby in Rails.

The problem is they don't mention exactly the reasons. They use words like RoR is 'easier', 'better' & 'faster'. That really doesn't say much to me.

Anyone care to do faithful comparison using code samples, case studies ..etc or from personal experience in using both?

Try to convince me to throw away all my years of learning C#, the .NET Framework using a powerful IDE (Visual Studio). Does RoR save you hours a week in development time? What are the major pain points in .NET that compels one to move away from it?

This question is NOT about a pure RoR vs ASP.NET (MVC) comparison. It's about the compelling technical reasons (getting bored does not count!) to switch over after using a platform for several years and start with a new language and platform.

(prefer this to be a wiki)