[logfromblammo]

The U.S. and Mexico have a lot in common. Seriously. A lot. A good portion of the U.S. was Mexico. The U.S. Southwest and the Mexican El Norte are in many ways more like each other than the other parts of the U.S. or Mexico.

So you might want to pick a different pair of countries.

For instance, the New York-New Jersey-Pennsylvania portion of the U.S. probably has more in common with Russia than Lithuania has in common with it. There are nearly ten times more ethnic Russians in New York City (600k) than there are in Vilnius (62k).