Paul, I have one I'm staring at this very moment I type this.
As far as I can tell, the book is the same, just a different title, and a different cover then from the original. (This one doesn't have a jacket)
One thing I did happen to notice, slightly different then the original GCOBI, is Rountree's artwork looks to be a tad more vivid with contrast. It could be me, but my Classics of Golf copy doesn't even come close to being so vivid.
From a collectors book I have, (Thanks Yancey) the books were the same, just named different for this paticular later printing.