Re the Kristofferson: There is a new color coming out this year (but I’m unclear whether they will offer it both in denim, and the other color, which I suspect to be black. To be clear, I don’t have any proof that it will be black, but the staff did confirm a new color when I visited the ship john store a few months back).
With regards to the jacket (with the caveat that I have tried a friend’s, but decided against buying one myself), it is essentially a Dehen product. I do think that the lining is truly superb. The denim is not as interesting as Iron Heart (in my opinion). The jacket itself is very warm, and consistent with the usual Ship John sizing patterns (which I think are a little less forgiving than other companies).
Overall, if you live in a particularly cold environment or run cold, and the jacket fits you, it’ll be a superb purchase. If not, you may find that it is just sitting in your closet.
Edir: forgot to add, I don’t believe that you can wash this piece like you can with the 17oz 526-SL with the polyester lining. If you would like to get a close approximation of what the material feels like, try to find this Dehen N1, which I believe has the same broken twill denim and mouton lining as the Kristerofferson:
https://dehen1920.com/products/n-1-deck-jacket-lasso-denim?_pos=11&_sid=b148a1b5d&_ss=r