Yeah - I agree with you that different cookers may benefit from different "slabs" to cook on.
One thing I noticed that in the new Uuni2, there is an approx. 1/4 slab of aluminum that the pizza cook on. We know that aluminum cooks great ( GrillGrates are a good example )..
I wonder if it is as much the thickness of the dough - and amount of toppings, that help us determine
which stone/slab is best for our individual uses... As an example - you never see the wood fired brick oven pizza shops that are cooking at 900F making thick pizzas. I used to think that was because they were cheapskates
....But, having tried thicker - and thinner pizzas in the Uuni....I think it is really based on how I make the pizza
I know the Kamado can get very hot too....so - does it does make sense that the thickness of the dough and toppings makes the difference in choice of cooking surface as it slows the heat transfer, allowing enough time for the dough to develop without burning, etc....