The difference is that the charge is fast and slow, the principle is like the fast charge function of many mobile phones now, fast charge uses high power charging, and uses the shortest time to charge more electricity, which can be understood as a waterfall. Slow charge is the use of low-power way to charge, the electrons are more gently stored in the battery, but the need for charging time is also extended, on average more than 8 hours, can be understood as a meandering stream.
Fast charging has a certain damage to the battery, the use of fast charging electric vehicles for a long time, the life of the power battery is lower than the long-term use of slow charging electric vehicles, so it is recommended that you try to use slow charging if time permits.