A comparison of the word rendering of 12pt Arial text with standard leading, and a scryber generated PDF with 12pt Arial text and standard leading.
Side by side
Click for full size
When the page sizes are the same, the font weights, leading and size match.
NOTE: Word reports this size to be 102% view of an A4 page and Acrobat reports this to be 89% view of an A4 page although it is a single image screenshot. This is due to differing expected dpi on the display by each application.