Snuff is very very very finely ground tobacco plus other aromatic ingredients to give it some unique scent. The consistency ranges between the fineness of dust and perhaps as coarse as sand. It is taken up into one's nasal cavity a very short distance. Some are quite strong re N. Others are less so.
The differences between Snuff and the tobaccos we're talking about here, if that's what you're kind of asking, are vast. Or am I totally misunderstanding your comment...I do that on occasion.