2006 was the first year of the 255. I currently own hull #16 (Captain's Cat) and hull #39 (Thataway). They are very much alike except for some small but important details. For example, on #16, all three overboards at the stern were at the waterline and the check valves on the bilge pump and the fish box macerator pump allowed some backflow, both into the bilges and the fish boxes. It was never dangerous, just annoying. I have moved them up on #16 and #39 had the bilge/fish box overboards up about 12".
Also, the cockpit hatches to the twin hulls on #16 were very small (12"x15"), too small to work conveniently through. I changed those to the largest that would fit, 14X30, or so. #39 had the larger hatches from the factory.
Along about 2009, or so, about the time Triton bought the molds, or a little before, they changed the interior to be a molded interior vice the Decraguard built up and removable cabinetry. IMO, not a good move and made the boat a lot less "customizable". Easier to clean maybe but again, not easy to modify. There are pictures of both interiors on some of the threads. In addition to that change, they installed a headliner, much like an automobile with some insulation, I think both in the cabin and the queen berth area. (you new TC owners correct me on this if it's not that way). Again, hard to "stick" stuff to the bulkheads and overhead if you wanted to add goodies. Probably warmer and quieter though but I don't buy boats for that, the Wallas keeps it warm and my hearing is lousy anyway.. :crook
That's my 2CW. Others will probably add to or correct stuff I said!!
Good luck on finding a boat, Captain's Cat is for sale, Lower LH corner of the home page!! My bride says I don't need :cat :cat if I want to keep one :hug2. As much as I :love boats, I love my :hug2 more!!
Charlie