I make no comment on US snuff because I haven’t used enough of it, but ‘snuff’ is descriptive of oral tobacco as well in the US. I can’t imagine any 100 page academic work, written in the US, that is not mostly dealing with ‘dip’. But regarding the UK types, what I am talking about are the snuffs that all share the same flour - so WoS SP types, florals etc will all share the same nic content, as will the Poschl and Toque lines no doubt - I am no expert but having used most of them I don’t see too many differences. Tom Buck, for example, is often described as a stronger version of WoS best SP, but it is the flavour that is stronger - the flour is probably identical to the best, so therfore is the nic content. But until the whole bunch of them are analysed it will remain a moot point.