Compared to what I've read of the new Catechism (CCC), this one is noticeably clearer and a more pleasant reading experience, although less detailed. The analogies and references to Scripture and Church Fathers used are clear and fairly easy to make sense of. In addition, not only is this book an explanation of the Catholic faith, it is an exhortation to live it: the language used is impassioned, owing to its intention for use by priests in instructing the faithful.
I will note that the CCC has over this version the advantages of more detail as well as numerous footnotes, numbered paragraphs and a good index, making it easy to cross-reference passages and look things up quickly. With this in mind it can't easily be said that either version is superior.