It has been quite some time since I read it, but my recollection is that Noah's transformation was depicted in a much more vivid manner.
I'm fond of these new editions, particularly this one since it's authored by Ian Marter, (Harry Sullivan). It includes a new foreword by Steven Moffat, the departing producer of Doctor Who. They are excellently crafted. Although I miss the original cover design, I believe certain elements have been enhanced.