I have these in the freezer for use in the occasional Bloody Mary or Screwdriver. Tonight I took small amounts neat though, just to see if I can express a preference.
I thought Stolichnaya was the best. It was rounded, flowing and just right. The Goose was good too but a little sharper. The Kryshtal (from Belarus) was harsher than these two, more spirity, but then too half the price.
Going forward, I'd select either Stoli or the Goose for neat sampling, and reserve the other for cocktails/mixed drinks.