Yes black nickel shell , the snare is tama starphonic 13x7 black nickel snare btw.There is no sound difference between a black nickel finish and a chrome finish, it's just aesthetics.
If you're talking about Tama's black nickel hardware, I would stay away. The finish comes off way too easily judging from all the Warlord snares I've seen with this problem.
EDIT: If the SHELL is black nickel, go for it. But if the rims and lugs are black nickel, avoid it.