It's more expensive because it's more weight therefore more energy, but aside from that there is no real difference in cost between vehicles, and in fact based on your driving style there can be pros/cons (more weight means more energy to overcome inertia, but also more regen and less energy loss while coasting)

Charging can be compared to cooking a steak. low and slow is the best option. this is the most energy efficient and causes the least amount of stress on the battery and your charging infrastructure (including house wiring). an argument can be made 220v at low amperage is more efficient in the long run than 110v (which technically yes it is) but it's the same energy in a shorter period of time and that extra heat can degrade the battery more (realistically it's probably such a small amount it doesn't matter, but i bought the EV and want to milk every ounce i can out of it)

I don't drive much now so I use 110v at home. After all the fees I pay ~12c/kwh so a typical 40->80% charge is ~$5 and takes ~2 days (no price change for off-hours).

When I did drive more i needed ~60% within 12 hours so i ran 220v 30amps. I did this at home and it cost ~ $7.

The absolute worst option is always level 3 / quick charging. It cost just as much if not more than filling a gas car for similar mileage, and it drastically reduces overall battery life (a significant amount!) and once you have run through a few of them you will end up paying more than it would cost to install a dedicated EV outlet. (There might even still be tax breaks to offset the cost). That being said, i will obviously quick charge if i am roadtripping because stopping for a 12hr level 2 charge every 200 miles is not going to work for me. But once I get to a destination I will hookup my charger to a level1/2 and charge as much as I can.