No for existing construction they will be more complex because the walls are all closed in so routing the 220V cable to the outside or garage is more difficult. Electrical is done before the walls are finished for a reason...

Maybe not if you're lucky and the existing dryer connection is already in your garage but it's not going to be that simple for most people. Again dryer connections get installed at build time and have for the last couple decades so most people already have them.