struct asdf vs asdf_t

gistfile1.c

// typedef
typedef struct
{
    int x, y, z;
} asdf_t;

int main(void)
{
    asdf_t instance;
    instance.x = 0;
    return 0;
}

// vs struct
struct asdf
{
    int x, y, z;
};

int main(void)
{
    struct asdf instance;
    asdf.x = 0;
    return 0;
}