Trading on Vaultoro means you place an order in the orderbook to buy and sell from other Vaultoro users. This lets you control the price you want to buy and sell precious metals for. Depending on the quantity and price the order may not be matched to other users, and may take long to be executed.
Vaultoro direct offers you a price, but in return the order is executed immediately. In this case you are always trading directly with Vaultoro as a company. Trading and the order book can be intimidating for inexperienced users and Vaultoro Direct offers a simple 2 clicks solution.