The only difference being the front cover has been updated.
This has a lot of very good line drawings and some photos. The information in it is very good.
But, I would suggest that people cross reference the plants they find with another field book before eating something.
The descriptions in the book are short, the emphasis is on the use of the plant and were you may find them. Remeber with out looking closely an untrained eye may mistake water hemlock (deadly) with water parsnip, cow parsnip, angelica, or wild raison at a quick glance. And that could be unfortunate to say the least. Other then that warning though I enjoyed this book and have had it a long time. It tends to be one of the books I carry with me when I go hiking and looking for plants and birds.