I am not aware of any other vodka flavors besides VTA. Some people add a few drops of actual vodka to recipes. I have dissolved menthol crystals in vodka and it worked well but I wasn't looking for a boozy flavor at that time - just the most efficient way to make a menthol concentrate.
Vodka doesn't really have a distinct flavor where Gin, Brandy, Bourbon, etc. do. Gin might be a better choice if you are trying to add a boozy flavor to a
juice. I am going to mix up all my various Breezes with Gin instead of Vodka.
Yep, not much flavor in VTA Russian Vodka. I do think that VTA Rums mixed with FA Jamaican are really nice!
Oh, and FA's Liquid Amber!!!! I bet you could put that in any juice for a little extra effect of fermentation.