In the U.S., things are drastically different from state to state. All our electrical outlets are the same (as far as I know), but whether alcohol is sold somewhere and when is another issue. Also, among other things: whether recycling is available, whether someone is allowed to shoot you for no real reason, littering laws, age of consent laws, liquor laws, whether you're allowed to turn right at a red light, whether u-turns are allowed, and, of course, restaurants. Some things, like liquor laws, can even depend on the county you're in. Do things like this differ in Australia like this?

I've never seen a 7-11 that sold bullets :P. Not in Michigan, even in the U.P., not in Virginia, not in Florida, and certainly not in New York City.