Compiler c++ or c?

Question

C++ / C#

Let's say I wrote code in c, visual studio creates only c ++ projects, but compiles c files without any problems, but I heard that it has a more complicated compilation step, and that if you compile on the same gcc it will be more efficient I

rephrase if you compile the same code, gcc compiler and visual studio c++ , is it true that gcc is more efficient?

Answer 1

Well, go to gcc :)

Answer 2

The compiler compiles what is given to it.
Everything else is not your skill.
However, you can replace Microsoft with Intel and get +30 performance out of the box