Yes the tubing is concept tubing, aslo note the orange shadow to the decals look the same as the one in your pic, but the others have a dark purple shadow.
is the concept tubing late 93 then? as the orange was used in some form on 94 models.
They used Tange Prestige Concept for the Kilauea from 1993 to 1995, having used it for the Explosif in 1991 and 1992. So although they changed the geometry radically between 1992 and 1993, it's natural to think of the 93 Kilauea as being similar to the 92 Explosif, at least in the sense of being of a similar quality.
I asked because the 93 catalogue says that the 93 Cinder Cone used the 92 Kilauea frame, and the 93 Cinder Cone was made of Tange tubing, but not Concept. So I think this points away from my thought that your bike might be a first sighting (for me) of a 92 Kilauea and towards your notion of a late 93 bike. Maybe they never sold the two-tone models in North America, but sold the claret-coloured bike in the beginning of 93 and your bike later on that year.
One way of proving it (if you can be bothered!) is to look at the serial number on the bottom bracket (may be cunningly hidden under the cable guide!) My 94 Kilauea has serial number F3098555 and it seems that the F says which factory it was built in and the 3 says it was built in 93. Since Concept was used for both the 93 and 94 model years, my proof that it's a 94 bike (it's been repainted) is that the top tubes of the 94 bikes were longer than 93 and mine is of the 94 length. If your number was a 3 and your tt length (c-c) was right for 93, that would prove that the bike is a 93 and the first sighting (for me) of a late 93 different-colour North American Kona range!