>For example, the version of Crystal Reports that ships with Visual Studio was completely rewritten in C#.

The .NET Framework was written in C# too. But that still doesn't give either of the languages an upper leg here.

The whole goal of the CLI and .NET Framework was that it makes no difference whatsoever in what language you choose. The only advise you should give is, try out the syntaxes of both, whatever turns your crank, use it.