Clan Wars reward tanks entered the second stage of testing. Three of the four machines will keep their specs unchanged, compared to the previous iterations, with the VK being the only tank to lose a bit of its firepower. The stats we gathered from the previous testing stage demonstrated that the increased armour alone improves the tank’s playability enough to remain highly competitive in battle. Thus, the VK’s gun characteristics will be equal to those of its current in-game version.
Source: World of Tanks Forum