cosmin
I have 2 machines one 7085 and one Di850 and they run with Hp 9085 toner and for now are ok.
Di850 has made about 30000 copies with katun Di750 toner a lot spillage then I started with HP toner and now for about 100 000+ prints, there is not a single toner spill on the corona. So I don't think that there is a difference in HP and Konica/Minolta toner.
The 7085 is runnig with katun Di750 drum and Hp toner there are problems but after setting DIP 6-7 to 1 it's ok for now.
The interesting thing is what kind of toner for DI750 are you using OEM or Katun. Are you switching to Di750 drum also?