Having watched both I suppose that its not really worth buying the 3 disc set, unless you MUST see the extra footage. On the new version: Disc 1 has a few extra little bits to a couple of the episodes; disc two is pretty much as per original; but disc 3 has much more in the way of extras, including: USA footage; one year on; Claudio's "incident"(the consequences of which were not mentioned in either the original DVD OR the book!!); Jimmy's story (??!!...why this was included escapes me?), etc.
The 3 disc set is roughly the same price as the original from some places, so if you are looking to buy the DVD, it makes sense to buy the 3 disc set anyway, but if you have the original.....I suppose, ya pays yer money....
Have to agree with Jedi re: the book / film interaction, although it did contain some interesting stuff not shown on film.
Still, after saying all that....and I know this is VERY, VERY SAD, but, I've read the book several times AND, watched both versions of the DVD far too many times to admit...like I said..I admit it...I AM SAD!!. I suppose it's some sort of voyeurism (sp?), and I'm living my around the world fantasy through these THREE (lets not forget Claudio rode almost as many miles AND had to film it). what the hell...for less than £13, go out and buy it, and draw your own conclusions. LOL