I believe QR has different F Champange route by route. On my recent F Flight (BKK-DOH on ex-CX plane) they served Charles Heidsieck / Bollinger Rose. As I can observe by different posts / reports Krug is mainly served to Europe / HK and maybe OZ.
I still try to get over my very very bad F flight expierences from BKK to DOH. From Check-in, Boarding in BKK, F&B and most disapointing Inflight Service by the crew to disembark in DOH... wow, lucky I just upgraded with my Q-Credits and didnt pay any $$$ for it.