I looked at the document, it's in German.
I can't read German, and I doubt anyone here can.
The image in contention is very clear. It's the only one in colour. It shows the two devices side by side, in an orientation that the Samsung device does not operate in.
What are you, in high school? Not everyone here is uneducated, or even American.
I've read the entire petition, and not only is wovel right about the additional photos contained in it, but the actual complaint in no way relies on the devices having the same size.
Basically, there are six distinctive elements that are at issue: (1) the rectangular shape with rounded corners; (2) the glass surface that completely covers the surface; (3) the metal edge that is visible around the sides of the device from the front; (4) the fact that the display is centered in the device; (5) the fact that the device has an equally size bevel on each edge of the display; and (6) the fact that the display uses colorful icons.
Copying only a few of these characteristics would be unobjectionable; Samsung's decision to include all of them does raise serious questions.
And it's not the case that all of these items are required for a tablet - look at the Acer Iconia (10" or 7") for a tablet that uses a different design, for example.