Similar to The new syntax “= default” in C++11

But with regards to member fields all having default values.

Given:

struct Pixel {
    int r = 0x00;
    int g = 0x00;
    int b = 0x00;

    Pixel() {};        // Empty
    Pixel() = default; // Default

};

What semantic differences do the two ctor styles have in this case?