I believe the Ashby is brand new to the EG collection (but it might be a revival of a previous style). Both styles have hand-stitched aprons (lakes), but the Yardley has the apron going over the sides (raised lake) while in the Ashby the sides go over the apron (sunken? Lake). Another difference is that the Ashby has sidepieces that go right from the toe to the back to the heel (just like the Dover) while the Yardley has separate quarters and a thus a division between front and back part. Ashby consists of 3 main pieces: 2 sides, 1 apron; while the Yardley has five pieces: 2 front sides, 1 apron, 2 quarters. Although I have the new catalogue (at least the wall sheet) a week or so in my possession, I hadn't noticed the Ashby before. It's rather a nice shoe.