Some are sticklers for same tyres front and rear but not me. If it works for you why not?
The F1 v2 are great in a corner and quiet which is why i chose them for the rear. Most of the tyre noise i find comes from the rear.
Out of curiousity through what ambient air / road / tyre temperatures have you run this combo? I've used 888s on a couple of car, both on road and track, and my worry would be that although acceptably well matched for grip at low to moderate temperatures, when the more track orientated rubber gets properly up to working temperature and gains significant grip, the road tyre will start to lose it.
On a side note, any idea what the tfsi is like for oil surge? On track I've known folk swap to 888s / track orientated rubber, and have issues with oil starvation in other vehicles.