-Yours is one of the older ones. The bottom right hand pic is one of the latest models before they brought out the Bennett series. What I was told by the owner of the local Samick dealer I used to frequent is that Gibby/Epi asked Samick to change their design a little. Even though they were making the same guitar for Epi, the Samick version was starting to out sell the Epi version so they flattened out the cutaway. This of course is unconfirmed, but I've known the guy for years and he isn't what you would call a B.S. artist. But personally I have never seen the headstock like the first pic before.
L8R,
Matt