It is not a perfect match, the font faces are different although the spacing appears to be almost the same.
Faxing always slightly changes the size of an image. This accounts for the "pulsing" you see in some image comparisons. Also, the fax had poor vertical registration, and the document was slightly skewed in the paper feed.
However, none of these distotrtions cover up for the fact that gross comparisons alone - line breaks, automatic superscripts in all places EXCEPT where a space is inserted, etc. - nail the documents as forgeries.
And then there are the dozens of diversions from military style in the documents.
And then there is the center-justified headings INSTEAD OF letterhead.
And on and on. At this point, you'd have an easier task making the Hitler Diaries be accepted as genuine.