I'm not sure where you would've heard the opposite. "Java the ecosystem" has clear advantages over "C# the ecosystem", but I've never heard anyone claim that Ja

I'm not sure where you would've heard the opposite. "Java the ecosystem" has clear advantages over "C# the ecosystem", but I've never heard anyone claim that Java is a better language. Things C# has that Java got years later or not at all include lambdas, LINQ, value types, reified generics, and async/await.