Dominos & Pizza Hut both use whole milk mozzerella (as do most pizza places, unless it's specifically a 4cheese blend, which is 2/3s mozz and the remaining 1/3 the other 3)... but most store bought mozz is part skim. So there's one difference.
The next two are:
- Homebaking pizza trick #1 : Cook on a stone (preferably) or a sheet on the BOTTOM rack, with the heat up as high as you can make it (500-550). This is if, and only if, you're making your own crust/ using bought uncooked crust. If it's boboli, or any other prebaked crust cook it where and at what temp the package says.
- #2 for pizza like pizzahut/dominos finish off on the TOP rack under the broiler. For about 30 seconds. This browns the cheese and it "seperates" the oils a bit... creating that oily layer. This is caused at PH &D's by the way that the roller cooker works... it cooks on both sides very very closely.
Same token most pizza places that cook in an oven brush the crust with an oil (usually a cheap one, but NOT canola). This deepfries the crust a little bit.. and gets a little more oil leaking onto the cheese.
The AMOUNT of cheese to use, is also problematic. Pizza places actually do testing on each size and crust type to determine how many ounces to use for each to create the amount of cheese stretching they want, as well as not being rubbery (too thick) or crispy (too thin). When places start cutting costs, they usually knock an ounce or three off of their cheese weight. Gourmet places use less cheese (because they want you to really taste their sauce, and they pay more for their cheese / so it has more flavor), chains use less. Finding the cheapest whole milk mozz possible will get you the closest flavor to PH & D's... a more expensive mozz will get you closer to PapaJohns.
Personally I like woodfired hand thrown pizza (with applewood as the combustible)... but that's a whole different series of variables.