And the two things I notice Java has that C# does not (static methods on Interfaces, and functional interfaces) have completely viable alternatives in C# (extension methods, and Action/Func, respectively). This really smacks of catch-up.
Speaking of C#, it's missing one critical for me feature: it does not run on the platforms I am (or my employer is) using. There are some attempts like Mono, but in practical sense it does not. That is sort of a no go right there.
You can tweak JVM but you can't tweak CLR. While it's not Java vs C# the language but the VM/Runtime and the language is almost tight together (Mono is an exception).
