As many no doubt have already known, Silver Spoon was created by Hiromu Arakawa, who has also contributed greatly to the manga and anime scene by coming about with Full Metal Alchemist. This series was first written and drawn as a manga from the August of 2001 all the way into June of 2010. This stellar manga has also spawned two iterations of anime. The first one being the original Full Metal Alchemist which was created in 2003, and Full Metal Alchemist: Brotherhood which was created in 2011.
It's quite confusing to many people who know of both, but don't know what the difference between the two anime are. While yes, they both have the same source material there are several key differences between them. Those who have been watching the original Full Metal Alchemist that started in 2003, remember that the manga hasn't finished yet at the time. As many anime do as they continue while the manga is still being written, they have to diverge from the source material. Although many people are confused by this, it isn't a bad thing, the divergent plots make it really interesting to watch.
After the manga ended in 2010, a year later they came out with Full Metal Alchemist: Brotherhood. This anime with a different title, is the essentially the same anime but it doesn't diverge from the original source material. To many hardcore fans of Fullmetal Alchemist this was a really hyped series.
Fullmetal Alchemist as a plot though is amazing, and should be enjoyed all together.