DIN or AGD: Which gauge is right for me?

What's the big deal whether a gauge—let's say a caliper—is an ASME design or a DIN compliant design? To the user, usually not much. There may be a difference in how or if performance specs are defined or the product is calibrated. On the other hand, however, there are products that are physically different between the AGD and DIN standards in both design and philosophy of use. A few that come to mind include dial indicators, master rings, and discs that differ in both their physical shape and how they measure.