Would love to see a picture of the Add-a-Quarter ruler and explanation of why it is better.
In traditional paper piecing, the paper is folded over on the fold line using a firm piece of paper or plastic. Then the add a quarter ruler is used to cut the fabric to get a perfect 1/4" allowance. The taper edge is on the opposite side of the ridge on the ruler so no extra item needed to fold the paper and it will help prevent accidents of cutting the seam allowance off. If you paper piece a lot then you will know the improvement makes the ruler so much better. I'll take a picture and post it later.