hi,
I know that post from iwulff I think two years ago, well, that was hoax back then simply put (though he was not to blame, a guy named gavin was..). Anyway, try install supremacy and bote, play them both for about 100-150 turns and see for yourself which you like most (or even both the same) and if you wanna help translating supremacy into german, go ask mstrobel. It should be easy to do with the xml files at hand.
otherwise BotE is a german project with a slight english touch so to say
so be sure to check out
http://www.birth-of-the-empires.de for a native german version too!
and btw. those games aren't finished yet though BotE already has a biting AI and a good chunk of botf gameplay already to offer whereas in both, a tactical 3D combat is a good year away at minimum I fear..