Basic Trade interface is for traders who just started in crypto currencies and want to do buy/sell with minimum fuss. Only type of order allowed is limit order to avoid slippage.
Advanced Trade interface, on the other hand, offers full functionalities and maximum customization any trader needs for their trading portfolio. Spot trading and margin trading are supported*. All types of orders are included (market, limit, stop, and trailing-stop).
* depending on product (trading pair)