I thought a dinning car was for dinning (set down dinning) and a kitchen car was where meals were prepared, two different cars. I guess there could be some combination cars, but the ones I have been in, it was two different cars.
A friend of mine in Europe was told that the new versions of these LGB dining cars had a kitchen interior - he wanted to verify if that was actually true before he bought one.
I image the layout would be something like the bottom car in the attached image.
In G-sale, I only remember USA Trains ever offering separate kitchen cars but these were for early 20th century trains.
I received some private feedback regarding this question.
The dining car does have a kitchen interior - it's the kitchen of the LGB 30520 RhB dining car, manually ut, trimmed and glued to fit.
A couple of images are attached.