As far as differences go I suppose biggest would be size. You could probably fit England into one state in the US. Here, we're a little more cramped.
Things here would probably seem very expensive too, you won't get free coffee top-ups in restaurants and the like!
The rules aren't so different, but if you want hot coffee, you can have it.
Here the pavement is what you walk on, pants are underwear; knickers too. A vest goes under the shirt and they're trainers not sneakers. We put trunks (large packing cases) in the boot (the trunk) and have a windscreen, not a windshield. A fender goes on the side of a boat, not a car. The car runs on petrol, not gas, although LPG is getting more popular - which really is a gas. We drive on the left - which is right and the police won't shoot on sight.
We don't sound anything like Dick Van Dyke either!