CAT SL 1Pre. Need confirmation re: Tube Complement

I would like some help regarding tube info on a CAT SL-1 MK 3 unit. If anyone has this unit, please tell me what the tube complement is in the V6 & V7 positions (line inputs). Is it 12AU7 or 6DJ8 types?

Is the MK 3 a HUGE improvement over the MK 2 unit?

All your help is greatly appreciated...