Steve,
I have, and use, both. I think there's some advantage to the TN bushings if you're doing neck sizing, and want to avoid the use of lube. I tend not to buy the TN versions anymore, simply because I so rarely use just neck sizing. Usng the Type-S FL bushing dies, I have to lube anyway, so there's really no point to the TN for me now. I will also add, as I mentioned elsewhere, that I do lube straight-walled pistol cases to be processed in carbide dies, simply because it makes the passage so much easier. I use very little lube here, nothing more than trace amounts really, but it does make the cycling much easier. I'd probably be inclined to do the same on TN bushing dies and pure neck sizing, should I go that route again. Your call here. I should add, however, that after extensive use, I have seen the TN coating chip or flake off. Took a BUNCH of rounds to reach that point, but I have seen it.
Kevin Thomas
Lapua USA