It's looking more like that way, although I would like to think that the 'manifestations' of off-island Charlie and Christian were the actual 'spirits' of those people doing the islands/Jacob's bidding. But I agree, the smoke alarm reference did seems to solidify the idea that Smokey can manifest off-island.
However, what if smokey merely facilitates to 'spirits' in appearing in the real world? I would prefer this as it would tick both boxes.
However, you could perhaps support the argument that Christian was Smokey by the sneakers and suit he was wearing..compared to the 'different' garments he was seen in when Claire saw him..
I think the best bet is that there's one type of manifestation which is smokies doing..and the other type which is the actual spirit of the respective dead person.
The more serious and sombre version, seems to relate to smokey - i.e Eko's last 'Yemi' encounter and Jack's encounter with his father in this episode
I think Hugo's encounter with Charlie was actually Charlie..even if he knew that 'Christian' would soon be visiting Jack..I just think that the spirits and Smokey are aware of each others presence.
