Well they're different but related! Difference between a 67 and a 73 is of course big in the eyes of collectors-- 1970 and on are not considered "collectible", at least not yet. That may change, since the 70's models were for the most part the same designs. (And in the 18 series, the same materials since they were always mahogany bodies.)

I included the double-O pic really because anyone that would like my guitar would sure like the OO, if they could afford it. And it is in my favourite American music store, the friendly and welcoming Maple Leaf Music.   

W-O