I am not an expert here, perhaps one of our resident shoemakers will chime in.
But there are three things to keep in mind:
(1) Your feet are different sizes. This is true for practically everyone.
(2) There is much more to fit than length and width. Unless there is something screwy with your feet, you'll just have to find a last that works better for you.
(3) If this is just a cosmetic thing (i.e, they feel comfortable and your feet are not hurting at the end of the...