If you need a fast charge, then the fast charge is your best choice, as it is able to fully charge the battery in less than an hour. However, flash charging is more popular than fast charging because it supports multiple devices and is one of the main charging options in today's cars. In addition, the average price of flash charging equipment is more reasonable and easier to install and operate.
If you need to charge in a short amount of time and don't need to fully charge the battery, then a flash charge may be more suitable for your needs. Taking into account your vehicle type, driving distance and charging needs, you can choose the most suitable charging method for you.
Fast charge is slower than flash charge, but the power is not empty, choose fast charge.