So watching both of them are completely different? Because I watched the FMA anime but not Brotherhood, didn't wanna watch the same thing all over again except for a few different scenes :P
Oh well I can tell you that easily! I looked it up before adding it to my list lol.
FMA is the first adaptation but it begins to deviate away from the original manga and creates its own separate ending. Brotherhood is a true-to-manga adaptation. :)