If I'm not mistaken, DANDR had a limit of 2 cups of low-carb salad-type veggies, plus a small portion of some higher carb veggies if you hadn't had more than 2 cups of the low-carb stuff? So if someone wanted they could eat 1 cup of iceburg lettuce (0.2 carbs), 1 cup of romaine lettuce (0.4 carbs), 1/2 cup of cooked broccoli (1.6 carbs) and that's it for the veggies, get the rest of the carbs from cheese or salad dressing or such?

NANY specifies that one should get 12-15 g of the 20 g limit from vegetables. Unless I am mistaken, this could be significantly more vegetables to achieve this - maybe as many as 5 or 6 cups of veggies if lower-carb choices are made?

That seems like a significant difference to me.
Also it says 1-2 cups of caffineated coffee are allowed instead of no coffee