1. Note the area affected? On all the images you are looking at the outside/inside edges of the devices. On a doubled die there is a spread in the centers of the devices, enlarging the size of the devices. On Machine Doubling
the devices are normal sized and the outside contour is removed from the coin, making the devices smaller than normal.
Can you see the size difference on the centers of the devices? That is where to look, not at the outside edges of the devices.
2. Taking images of single devices, makes the devices look more interesting than they really are. The definition is gone when you look at stuck too close. (Nothing looks like something) When they are a single device, it removes perspective. The more devices are better than just a single device.
3. When the contour is removed, it is not a doubled die. The machine removed the area you are looking at. On a doubled die, the devices are enlarged on the die, thus the term doubled die applies on to doubling on the die. MD is altered by the machine and often shows on both sides of the coin. On a doubled die, the opposite side of the coin is usually normal.
Here is a side by side with a normal and a doubled die:
Here is what the devices will look like a 1966 DDR
Depending on location on the coin, the devices will be wider/taller than the normal examples.