(All My Notes are attributed/sourced from the Resources directly preceding them.)
Summary
Razer is an alternate way of building server side web applications to MVC
The reason you would use razer over MVC is that Razer is more friendly to beginning developers.
Razer is also more efficient when building web apps on a smaller scale than MVC where you do not need controllers and models to be in different classes.
Razer is currently a new addition to .NET and will probably get better over time, but MVC has been around longer and so has been more fully fleshed out in it’s implementation.