This article compares only Canon cameras. Specifically 7D with the highest pitch. But you have to understand few things about this article. It is written as we say "technically speaking". For example I would prefer 5D2 (5D3) to 7D anyday.
Someone said "The only time crop camera wins over FF camera if you are focal length limited" technically speaking that is correct but in real life most of the time it is not true.
I might not be able to get closer to the moon, after all it is 384,000 miles away but I sure can get closer to most subjects on land if I really wanted to. If there is a will there is a way.
Also, take a look at the image of the moon from 7D compared to 1D4. I sure like 1D4 image better. And I bet if D800e was used, it would probably create the best image in that situation even though 7D is, technically speaking, 46mp camera in FF terms.