The book better known to English-speakers as Prisoners Of The Sun was originally published in Tintin magazine beginning in 1946, and this edition reproduces that version with the original colours, format and extras that are found only in that version. The book is notable for being printed in landscape orientation (unlike any other Tintin adventure) and apparently contains over three hundred illustrations that were later excised to produce the album version (and no, I didn't count them!).
If this is the first facsimile that you buy in the Tintin series (and almost all the original albums are now available, all in French) you will find that the paper has a matte finish and the colours more muted. Most readers agree that the books look better this way than the rather gaudy, primary-colour versions of the 1960s and 1970s that are reproduced with English text. That said, if you already own the books in English and are more comfortable reading them in that language then artistic considerations are probably not enough to justify rebuying the set in the numerous historical editions.
If, however, you are tempted to experience Tintin as it was first published, then I'd heartily suggest that you start here. It's a beautifully produced book, you get extra pages (including around twelve pages that close the first half of the story, published as The Seven Crystal Balls), and those with more advanced French can even read the boxout sections on the Incas that were added late in the story.