If I remember correctly there is one other major Fate/Stay Night related fighting game.
It's Fate/Tiger Colleseum. The game was als handled by Cavia and published by Capcom. Fate/Tiger Colleseum is more like powerstone, and the character look a lot more cuter, and it's a lot more easier to play, and really not aimed at fighting game crowds as much as a tribute to the very famous visual novel game. There was also an expansion/extra version of the game which was release late last year i think.
This game is probably aim very much at hard core fighting game crowds and looks much more refined.







