Different volumes of the same title. OK, i'll give you the benefit of doubt.
Who knows, perhaps it was a desperate act by Churchill to try and save the Empire he'd destroyed. He would have seen them as separate to the British race/heritage.
He was all about money. He was a bigot and a war mongering alcoholic.
Tbh, Churchill didn't destroy the empire. The empire pretty much dissolved. Its time was past.
I've read a couple of the many Churchill biographies and it seems to me that his bigotry was typical of his times, but also that he did include all the "English-speaking peoples", regardless of colour as British Subjects.