>>21433788"Literally" not just a pizza. You can see that the dough is of a different consistency entirely. I don't need to eat something to know it is considerably different from something else. I've seen the pictures and read the recipes. Also, my dad said they had it in the 70s and it was a memorable meal. Spinach deep dish in downtown Chicago. The man ate a lot of pizza in his time and thought it was quite special.
I doubt you've even tasted it if you think it's "literally" just a pizza with extra toppings. Condolences.