Here's an interesting source for documents on Brunswick tables, including some pictures, specifications documents, and installation manuals: http://www.mediafire.com/pooltablemanuals
[Note -- the comparison chart I mentioned earlier is one of these documents.]
I have seen the comparison chart before. I really feel like someone made it with best intentions but it is not complete. It is very interesting though. It was argued on here years ago that only GC II's had the small extrusions as opposed to the ones that went the entire length of the apron. That was found to be wrong. I trust the word of Jay Speilberg who has been a pool room mechanic since the early 70's. I wouldbe interseted in what he makes of the "Chart".