I have used some of this paper, the VC.
It behaves very much like Du Pont Varilour (I still have some). This is hardly surprising as many Adox Products are DuPont formulas.
The paper surface looks similar-not a brilliant gloss. I have even seen a silver sheen induced on the surface which ocurrs sometimes on Varilour.
It tones well and responds well to blue black and olive black bleach and redevelopment.
I have 1 set that I bought in the 60s and another that I bought from a Photo Shop that was going out of business. I also have Kodak and Ifford as well as a color head, but I think the DuPont filter give a "cleaner" look with bright highlights. I think the #9 gives a true grade 5, but it is very dark and hard to see the image and prints slow. Maybe just my bias. You can find DuPont sets on E bay.
Ilford have changed their Multigrade filters slightly over the past few years, and made one huge shift compared to the very first generation of Multigrade, which was produced in the 1950's.
A set of mounted 151 filters, for Tungsten lamp. has yellow for Grade 5 and Magenta for Grade 1. When they relaunched Multigrade in the 70's they completely reversed the colour sensitivities, and the filters too.
This is most likely a good explanation as to why I may not have gotten good results with Ilford Mutilgrade, my Ilford filter is an old set as well, but Dupont works well for Kodak. I will buy some Mutilgrade and get a new filter set, or reverse my Dupont set.
Adox seems to filter with the Dupont set, I will need to look to see if a data sheet was enclosed with the paper, I have been screweing up all along.