There is a difference. On raised devices, the MD altered the devices and marks them smaller from the die movement. The die is incuse for the devices, so slightest movement after the the strike alters the devices. They are reduced when you consider the overall size is altered smaller:

On incuse devices on coins, these devices are raised on the dies. So slightest movement before or after the strike. We have seen that a lot on the
ATB Quarters. About 70% of these suffer from the sightest MD to devices way of the area they should be. Again, because they are raised on the die, that movement enlarges them.





What is the biggest issue with the MD verse Doubled dies? On a doubled die the hub makes a die that is not normal. I call them varieties. Each coin struck with this die will show the same exact hub doubling. Thus the term doubled die, because the die is doubled. On
Machine Doubling examples, the examples are normal dies, but the strike alters the devices. The devices are normal sized on raised devices, and enlarged on the incuse letters. Just the opposite with a doubled die. The devices are enlarged on a doubled die (and consistant because the doubling is on the die) and the incuse devices are smaller than normal. (Take another look again on the 2013DDR I posted. All these images are from the same doubled die. Enlarged devices on the raised devices and reduced sizes on the incuse devices.
On the 1972 cents they are enlarged because they are raised on the coin, and doubled on the die.
MD is not consistent. Each strike it a random hit:

MD can happen on doubled dies as well:

Hope this helps? If not, ask another question.