Better doesn't come into any argument.
Peformance varies depending on application. The compilers are leapfrogging each other so yesterday's performance report may be totally reversed tomorrow. Don't read too much into performance reports.
Do you wish to stay in the MS world or venture into Linux, Macs and Androids?
Are you working on Websites, desktop applications, backroom servers, mobile devices, embedded devices, IOT?
If you are staying in the MS world and are willing to have a "better" way of doing things every 3-4 years, you could go down the C# route. Whenever you lookup something in C#, like Java, check when it was written. They keep on introducing new APIs every 3-4 years. On Linux/Mac it is known as Mono but it is always one or two generations behind the MS version.
If you want to work on a range of platforms, go down the C++ route. C# doesn't exist for devices like PIC or Arduino.