Take for instance this menu at Dominos. In the states, a supreme would be called an Extravaganza and have typical American toppings, but in the U.K.? Sweet corn? Yes, sweet corn! For us this was another instance of Brit's healthy adaptation of life. They sneak veggies in everywhere there. What makes it even more odd is their "Full House" pizza aka "UK Extravaganza Supreme"... has pineapple on it. Sweet corn & Pineapple????? I've heard of Hawaiian pizza, but pineapple, corn, and pepperoni? You can check on the menu I scanned for the other oddities, but clearly they have different preferences there.
As for the actual pizza, as with almost all comparable food, the food (proportions) are smaller. Another interesting thing, and it's not really as though I missed my ounce of soda in a can, or the fact their crust is much, much thinner than the US version. It also didn't seem as glutenous.
If you ever want to know why Americans are fat here's the secret, the food. While the UK Large is 13.7 inches and the US version is a close 14 the big difference comes in the fat and ingredients. The UK Full House Pizza is 8.7 grams of fat per slice. The US Dominos version (Extravaganzza) is nearly double at 16 grams of fat per slice.
The truth is, unless I actually looked it up, I would have never known. Little things like that add up. If the 8 grams of fat is too much, the London Dominos we ordered from allowed to you to order a low-fat version of cheese, or Goat cheese.
But based on taste and healthiness, I'd clearly say that U.K. Dominos is a much better improvement over the U.S. version.