It depends on what you buy.. a breeder queen will be pure, anything else will be a combination.. each queen will mate with 10 - 15 drones.. I have read 20 in some estimates, so the genetics from egg to egg she lays will be different.
The genetics do fade with each generation, so its up to you to select, and continue the traits you want.. two daughter queens from that Russian queen may show very different resistances, you re queen the bad one and keep the good one going to maintain the russian traits..
I call my hives Italian or Carny, but its mostly based on their color and their habits.. Italians are yellower, Carnys are darker. Italians winter with bigger clusters, and Carnys with smaller.. Feral bees around here look a lot like new world Carniolan being more gray with some darker bees among them.. After a few generations of your own queens they are Mutts, but often if their colors and traits resemble one of the other races thats what I still call them...