Danielle, Ruth's advice is sound. You might find the Core plan on WW a good mix of the two, but I think you'd still be counting points.
For me, I found that WW was not possible. I couldn't stick to the small portions because the sugar I was eating made me crave. SBD works for me because I'm not craving.
You definitely can have pizza, chinese, and tons of casseroles on SBD. Of course, you have to make most of them yourself, but if you're willing to do that, it's totally okay! I found WW pizza crust at my local grocery store and Boboli also makes a thin WW pizza crust. Then I make my own sauce or use a jar sauce that doesn't have sugar (there are tons of them, just check the labels) and put skim mozzarella, turkey pepperoni, veggie sausage, tons of veggies, etc. There are tons of toppings you could use. I also sometimes buy the Amy's brand of frozen organic pizzas. They are made with wheat flour, not whole wheat, so I try to limit my consumption of them, but for a meal in a pinch, they work well. I stick to the spinach or pesto ones as they don't have red sauce. Kraft also makes three SBD pizzas, frozen, but I have to admit that some of the ingredients scare me and don't seem OP.
For Chinese, I find that eating out is tough. Mongolian BBQ is fine, as you know what's going in it. Stick to soy sauce or sauces without sugar and watch out for msg. We made tons of chinese at home and there are lots of recipes that are easy to adapt. Or you can get some dishes at a local place...just make sure they don't have sugar or MSG and have them at home with brown rice. Easy!
Casseroles are super easy on SBD. My two favorites, which are both on Phase 1 are Chicken Divan (in our recipe forum) and the Chicken and Eggplant one in the SBD cookbook. You'll find tons of others in our recipe forum.
I wish you luck! If you feel bloated, it could be too much salt or not enough water. Check that out and see if it helps!