I'm not into drifting at all, unless it's on a very large (obstruction free) snow/ice covered parking lot. But since I don't drive the XF in the winter, I'm out of luck. And what I do drive in the winter has front wheel drive, so again, I'm out of luck.
But couldn't you compensate for the "NA" Crossfire's pitifully weak power by simply installing skinnier tires?