Vorpal 1 is the higher seed.
Per playoff rules: EU gets the choice of 3 maps or factions, but Vorpal 1 chooses whether they want to pick their maps first or second. In this case, maps are not picked one at a time - Clan A picks 3 maps, Clan B picks 2 maps and 3 factions on Clan A's maps, Clan A picks 2 factions on Clan B's maps. The server is in NYC.
As of 5/10/19, this match has yet to be played.