Warships Premium Account applies only to World of Warships.
Warships Premium Account brings you 15% more XP than Wargaming Premium Account. This bonus also affects the amount of Commander XP and Free XP you can earn.
The bonuses provided by Warships Premium Account and Wargaming Premium Account do not accumulate. If you have both types of Premium Account active, you will enjoy the bonuses associated with Warships Premium Account only.