MathewM:
Having acquired both the Fazio and the Nicklaus book, I guess you could say I recommend both.
But, it partly depends on how serious you are about building a golf architecture book collection and your reasons for acquiring any particular book.
Like it or not, Fazio and Nicklaus are two of the most prominent people in the golf architecture business. So, for that reason alone I want to own a copy and see what each said. Pete Dye wrote a book. So did Robert Trent Jones. I prefer to own them all.
But, I don't buy these books to "learn" something about golf architecture. For that I would recommend starting with the classics, the writings of Thomas, Hunter, Mackenzie and Simpson.