The cost per mile of EV varies significantly with many dependent variables, but suffice it to say its still an order of magnitude less than a gasoline car.
Using tiered-residential rates and night-time charging, the cost to drive a mile in an EV is approximately 1 cent per mile. When total-cost-of-ownership factors in maintenance, the cost per mile may be 2 cents per mile, mostly due to tire wear.
The big variable for EV efficiency is speed. At higher speeds, the wind-resistance dominates. At speeds less than 30 mph, wind resistance is minor. Highway driving thus consumes 50% more net electrical energy as driving around town.
For a typical 18 mpg gasoline car consuming $4.50 fuel, the cost per mile is $0.25. When factoring maintenance (oil, water pump repair, fuel filter, spark plugs, etc.) at $1000 per year, it climbs to $0.35 per mile.
The cost of brake maintenance on an EV is significantly lower because 90% of all braking is a regenerative using the motor. A hybrid has some regenerative advantage, but its carrying more load and thus more momentum.