You get a little white X-Fi illuminated logo on the black casing of the Fatal1ty one.
Plus other stuff too I'm sure.![]()

The Fatality also has X-Ram, although I am not sure if it is that useful. It basically allows the card to decompress audio files during load time of a level, therefore reducing the load on the CPU used to decompress the files during gameplay.
I don't know how many games support it, but I do know stuff like BF2 and Doom3 do.
And this all happened shortly after I spewed out for my prelude.