Cross country bus travel in the US is accomplished by the riding the 'hound. Greyhound that is.
In Ireland one can cross the country by bus as well. But you'll take that journey in a bus adorned with an red Irish Setter.
So I suppose that means that your bus ride in the US will be faster, but the ride in Ireland will be better to accompany you on a hunt. Or is better for hugs. Sure, we'll go with that.