The states tend to be very different from each other.Ukraine is in Europe, you don't have that for a start. The countries in Europe are very different from each other, you are all Americans but each European country is their own nationality of course. It's more than laws or customs that make countries different.
The continent of North America though includes Canada which is not the US
My gf lived in New England, and Florida but was amazed at the cultural differences from either here in the Midwest.
The idea that California, Texas, and Massachusetts all have the same culture is pretty funny.