They also have 50 cycle (Hertz) instead of our 60.
Although it is common to refer to 110 and 220 v., they have been 120 and 240 v. for many years in the US and Canada. Checking some websites I found voltages were misstated for the US at 110. But it doesn't matter that much since the necessary equipment will work no matter whether you call it 110 or 120.
Plugs here are standardized for different voltages, amps, phase, but other countries have different standard plugs.
Here's a link with voltages and plug types and some info about transformers and converters. Be glad you are not going to Brazil where there are no standards. Electricity around the world: everything about plugs, sockets, voltages, converters, etc.