Dear jheem: I don't remember seeing either of those words
before I found them a few minutes ago. I see no likely difference. Never heard of Pres.Grant's problem. Oral cancers from snuff are not rare, but I'll bet they hit the cheeks or gums first. Good thing lies don't cause cancer. Or maybe fear of it would encourage veracity.
Trying to think of a fancy word for Pinocchio's problem.