Looking more closely at the art and the previous model, it does seem like the art imitates every aspect of the model fairly closely, with the exception of the missile tubes being 8 per column rather than 6 per column on the model.
But everything else -- the proportions, the sail, the diving planes, the tail and pumpjet, hull geometry, all seems like it is based off the model, or vice versa, or both are based off a same original design or article... though given the detail on the model I'm inclined to think the first option.
I wonder if the difference in missile tube count per column is a case of artistic license (or even artistic mistake), given everything else is so consistent with the model.
But either way, I agree this is definite additional weight to reinforce that the model from last year is significant in one form or another, and I think we are all eager to get some better pictures of the two (or three) nuclear submarines we suspect to be 09IIIB hat were launched over last year/this year, and to see if the details of them are consistent with the model/art. Even if we can't get detailed pictures of it from the ground (which aren't likely to happen any time soon), if there are satellite pictures of them that can catch any VLS open in the position consistent with the model, that would essentially be confirmation that the model is legit.
And for below, a reminder to others for what the pictures of the model looked like if we forgot:
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