Instant powdered milk has one major advantage over regular powdered milk - it mixes up much more easily. Using the photo below, the regular powdered milk is on the left and the instant milk is on the right. The first picture was taken just after the two milk powders were placed on top of the water in the glasses. The bottom picture was taken 35 seconds later. Notice the instant milk has sunk down into the water whereas the regular milk is still just sitting there.
Instant powdered milk is made from regular non-fat milk. The instant milk USA Emergency Supply supplies is made at the same time the regular milk is made. However, there's another way of making instant milk using older processing equipment. Regular milk powder is fed into a spray of steam in the top of a drying chamber. The steam slightly dampens the milk particles which stick together enclosing numerous air pockets as it dries on it's way to the bottom of the drying chamber.
a teaspoon of regular milk on the left and a teaspoon of instant milk on the right...
Once in a while we get ask the question if the nutritional quality of instant powdered milk isn't as high as that of regular powdered milk because it has been further processed. With the new processing being used to make our instant milk, there is no measurable difference in the nutrition between the two milks. We also often get ask the question, 'which of the two milks taste better?'
There wasn't much difference in the taste before but now with the new processing machinery, there's extremely little to no distinguishable flavor changes between them. So in light of this, the real questions are if you want the slightly less expensive and more compact regular non-fat dry milk or does the instant non-fat dry milk's improved mixing quality make it worth it's slightly higher cost and bulk. The question is yours to answer.