At first blush as a Process Authority, I would say No. Upon further thought, I would consider the heating characteristics of the food product. If it is a conduction heating product, then no and I would stand behind it. But if I remember correctly, the two piece has a rounded bottom, whereas the 3 piece has a seam at the bottom. A convection heating product could differ in the heating curve because of the container difference. Also a broken heating curve versus a straight line would also be suspect. In both cases, convection and broken heating, I would test it for confirmation. One may consider it more work, but I look at it as more information to build your peer confidence. A Process Authority must have peer confidence for acceptance.