constexpr global constants in a header file and odr

Unfortunately, I am somewhat confused about constexpr, global constants declared in header files, and the odr.

In short: Can we conclude from here

http://ift.tt/1KsX1JU

that

constexpr MyClass const MyClassObj () { return MyClass {}; }
constexpr char const * Hello () { return "Hello"; }

is preferable over

constexpr MyClass const kMyClassObj = MyClass {};
constexpr char const * kHello = "Hello";

for defining globals in a header file if I want to "just use" those globally declared/defined entities and do not want to think about how I use them?