The Q69 indeed has a swallow tail. I shaped this board with the swallow and after some team sailors tried it and liked it a lot, it was decided it would become the 2011 69 liter production board.
There are also many other shape details that differ between this board and the others. The 69 has a single concave, no v, and a lot more rocker fx. Which is not strange since it in effect was developed separately from the others. But regardless, it's a really nice and very radical board.