As a native of NYC Pizza country, it can be both or either. . . just not at the same time.
If you have meals that are only 300 calories, I sure hope you're eating 8-10 meals per day.
I actually developed a Weight Watcher's equivalent that's pretty good. I mentioned it on the other pizza thread. On Weight Watchers, one wants to eat the least amount of points in foods as possible.
A regular thin, crispy crust slice of full fat, full carb NYC pizza is roughly about 7-9 Weight Watcher points. And I usually have TWO slices. (A meal.) Total 14 points.

But, 14 points is almost 2/3 of my daily points - and that was just for ONE meal.

I shaved one slice down to 4 points!
I use Trader Joe's lowfat, Lite shredded mozzarella cheese. It melts wonderfully and doesn't taste like plastic. I put on extra cheese so it's 2 points. Trader Joe's pizza sauce tastes like pizza sauce.

It's not just spaghetti or tomato sauce in a jar masquerading as "pizza sauce." 2 Tbs is 1 point. The key to getting a thin, crispy slice is using a really thin flatbread. Not a doughy flatbread, but a thin one with low points. Trader Joe's Lavash bread is the one I use. It's cracker thin and crisps up, giving me the thin-crust taste & texture I have to have.

One half square (or a rectangle) is 1 point.
I actually assemble the pizza slice and put it right on my toaster oven rack, no tray used. I simply set it on my regular toaster setting for toast and it crisps up from underneath while melting the cheese on top. (Just make sure the cheese isn't piled on to the edge or it starts melting off the sides.

) Total points for one slice is: 4 Weight Watchers Freestyle Points! Since I usually have 2 slices, (a full Lavash square,) the total points is the same as
one regular NYC slice. Yet, I get to have my two full size slices for a meal.
If one isn't near a Trader Joe's you can make your own substitute. Just Google the calories & fat of the individual ingredients and find acceptable substitutes.