If you're going to compare that way, you need to factor the relative efficiencies of the two fuels -
electricity can be converted into kilometers about 3.5 times as effectively as petrol can.
Rule of thumb; Electric cars get 5 km to the kWh
500 kW watts for 10 minutes = 83 kWh = 400 km = 250 miles
But really, who cares which is faster, which do you think about first when deciding what car to buy;
Fuel economy, price, style, carrying capacity, cost of maintenance, or speed of fill up?
Charging doesn't have to be fast, it just needs to be fast enough.
For most people, electric cars can be charged at home overnight.
It may be a longer overall time, but it's a lot less of my time (a few seconds to plug in vs. a few minutes to fill up).
For long drives, a diner/charging station would work fine. Thirty minutes to eat and charge.