Flavor components of high end vodka?
High end vodka is primarily good vodka+branding. You pay extra to get that designed bottle. Perhaps the manufacturer also does something extra that they claim makes the vodka special. Whether it actually does depends on what they have done.

Good vodka has most flavours removed. Some flavours - specifically those that both have a boiling point close to that of alcohol and the ability to pass through an active carbon filter will remain.