.NET SDK vs RAS SDK

Hi,

We've been using the .NET SDK for a while and I'm looking at changing to the RAS SDK.  We don't use Crystal Server very much and none of our .NET applications use any reports on the Report Server.  We develop for both Windows and Web via ASP. 

Is there an advantage to using RAS?  I know performance should be enhanced with the RAS but any other reason to change? 

Thanks,

Brian