I think you will find all the information you need in either one. In my opinion, there two main differences between the 2 books. The first is that Silverberg tries to include both cytology and surgicals in the same book, which is awesome. It incoporates both knowledges in the chapters and give us the insight of a daily practices, since we often have cases that we need to correlate both and with the frozen section labs so present in both community and university practice. However, if you really need cytology references, go for a cytology book. The second difference is that Rosai writes almost the whole book by himself, which I find amazing. I dont believe anybody else in the world could do that nowadays. On the other hand, Silverberg book is written by authorities of each field, and this, in my opinion, make it more reliable. Both are great. I go with Silverberg, but i am also from Maryland, and thus entirely biased.