First I would like to point out that both sexes of all geese are lobed either single or double. When laying the lobes or lobe on the hen tend to become large as that's where the eggs are formed and are commonly called a paunch.
Beak color is not a diffinative way to sex embdens. All embdens have a tendency to develop pinker feet and beaks it's a recessive trait I believe that's expressed when two recessive's match up, or it's because of crosses with geese for which pink bills and feet are a necessary characterisctic according to the American Standard of Perfection. My embden geese are not able to be sexed this way nor are any other true embdens I've seen.
With adult geese the ganders honk tends to be higher pitched and almost shrill, while hens will be lower more like an actual honking sound. Ganders tend to stand up straighter and are usually larger in size. They also tend to have larger and more masculine looking necks and heads. It's common for young hens to have gray or bluish tinted feathers their first year before adulthood most commonly found in their wings and sides.
This is my trio last fall as young geese, the gander is in the middle.
These embdens we had earlier this decade, the two hens in the picture above are descendents of them. The ganders are in the middle. Obviously size is not always a good way to sex as the gander second from the right is tiny and the hen at the far right was huge.