Even more so then the FXX-K? I bet you are very much looking forward to getting behind the wheel either way.
Yah, on most road courses. The FXX-K is more powerful but also heavier and considerably less downforce. I've seen one run :27s at Laguna Seca with a pro driving, and *I* have run :25s in my GT3 car there.
On a track with long straights the 'K is going to be tough to beat. But on most tracks, lighter + more grip is a winning combo.