What’s the difference between Market Order and Market to Limit order mode?

Market Order

A Market Order is an order to buy or sell at the market bid or offer price. A market order may increase the likelihood of a fill and the speed of execution, but a Market order provides no price protection and may fill at a price far lower/higher than the current displayed bid/ask.

Market to Limit Order

A Market to Limit order is submitted as a market order to execute at the current best market price. If the order is only partially filled, the remainder of the order is canceled and re-submitted as a limit order with the limit price equal to the price at which the filled portion of the order executed.