Hunchback of Notre Dame: abridged or unabridged?

I just read Victor Hugo's "The Hunchback of Notre Dame", in an abridged form of Puffin Classics, and I greatly enjoyed it. I was wondering what are some of the differences between this abridged edition on the text and the unabridged one? Is the latter much more detailed and longer to read? Would it be worthwhile to read an unabridged version too?