I just "discovered" this thread and some of you know I spend most of my pomegranate discussion time on a Yahoo group I started five years ago.
There are probably some pomegranate plants sold under the name "Russian", "Russian 8", and "Giant Russian" which are, in fact, Salavatski. The confusion was created mostly because one hobby grower relied on Sharpie markers to really be permanent and discovered too late that they weren't. There could very well be trees with different genetics called "Russian". There are a lot of Russian pomegranates.
Kazake was mentioned somewhere above as being sweet. It is a sweet-tart type, similar to Salavatski. In the 2009 tasting at Wolfskill when I believe it was last included for tasting, the order of fruits from sweetest to most tart included Kazake at #10 and Salvatski was #11. By comparison, Parfianka was #7.
Here is a photo from another member of the pomegranate discussion group which shows Kazake in the middle and Salavatski on the right:

Group is located at http://tech.groups.yahoo.com/group/PomWorldwide/
Someone mentioned the taste of Angel Red. I have 8 trees of Angel Red in my orchard. It doesn't ripen nearly as early as advertised, at least in my location. When I let the fruit get very ripe in late October it was quite good. I supplied fruit of it to Jeff at Davis and it was included at the Wolfskill tasting earlier this month and it was pretty well received but the seeds were harder than Wonderful, IMO. The fruits are also smaller. My earliest variety is Granada and it was spoiled already by late October. I am also growing a couple of Kandahar Early but it's not producing yet.