Both eaves and vees are virtual currencies on Empire Avenue.
Eaves are the main currency on Empire Avenue and its the currency used to buy shares in other players, used in missions, buy upgrades, etc. Eaves have no real world value.
Vees, on the other hand, is the currency that can be exchanged for real life items outside of Empire Avenue such as items in the People's Market or gift cards (such as Amazon) and cannot be used to buy shares in other players. To get vees, they must be either be bought from the Empire Avenue shop or earned through Empire Avenue missions.
Please note that Vees have been phased out of the game. We will update this article as soon as we can. Eaves are now the only and main currency of the game.