In the first edition: "On the Edge: The spectacular rise and fall of Commodore", the Commodore part (1974-1984) is 348 pages, and the Amiga part (1984-1994) is 200 pages.
In the second edition: "Commodore: A company on the edge", the Commodore part (1974-1984) is 542 pages.
So it's quite an improvement (and not just all pictures!)
I can't really recall the difference, as it's been a few years since I read the first edition. Just finished the second edition though, and looking forward for the extended Amiga part (whenever it will be finished)