Well, Sigi, you are definitely correct, it is not the same variant as in the Gorny and Mosch sale. That is for certain. But to me it does not entirely match the photo you have of the common variant either, which may just be a simple difference of engraving by different die engravers or some issue of early 19th century quality control.
The differences between the crown sizes and wing tips (the crown on the ebay piece appears to be an earlier, more crude crown, I'm not sure if it is necessarily larger than the crown on the G&M piece; the wing tips have tips drawn to more distinctive points on the ebay piece) are good reference points but something that always helps me differentiate between varieties is the distance between devices on different variants. For example, to me it seems that there is a longer distance between the tip of the tail feathers and the inside concentric circle on the G&M coin. In addition, there is a marked difference in the scepters. The scepter in the ebay piece appears longer, and is held at a wider angle away from the eagle so that the tip of the scepter is nearly touching the inner concentric circle. There also appears to be a wider space between the scepter and the body of the eagle as well. It also seems that the pattern of how the feathers on the body are laying is distinct as well.
Does anyone else see these differences? Am I on the right track? This is an area that really needs some help for me IMHO.