It's like gas: some people measure it in liters, others in gallons. The gas is the same.
The euro-to-dollar rate changes by tiny amounts in a day: it was 1.0850, now it's 1.0870. A change of one unit in the fourth digit after the decimal point is called a pip (traders also say “point”). Here the price moved 20 pips. For pairs with the Japanese yen, such as USD/JPY, a pip is the second digit after the decimal point.