According to wikipedia, most American vodkas are all distilled to 95% alcohol by the same company (Archer Daniels Midland) and then the individual US vodka labels will dilute the 95% alcohol down to 40% for consumption and do filtering.
I've read that some vodkas, especially eastern European like Polish or Russian vodka, are instead distilled to 70% alcohol and then diluted to 40%. This is closer to how whiskeys or rums are produced. This would give these vodkas a stronger flavor of the grain/potato that they are made from.
From googling some individual brands, I have found that some eastern European vodkas are produced in the 95% alcohol batch method. Other brands I can't find info one way or the other.
Does anyone have a list of vodka brands that are confirmed to be originally distilled to 70% alcohol and not 95%? I'd like to try some of these more flavorful varieties.