For that, a reflection densitometer will tell you what you need to know. Perhaps someone has the numbers handy.
I have a silver print I made in 1971 on glossy paper that is no longer available, selenium toned, and it has a very rich black. I'll compare it to one of my inkjet prints. My guess is that they are very close in terms of dMax and dMin. Probably indistinguishable.
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