Great Horned are, as you said, almost the entirety of the Americas with different subspecies throughout.

Barred used to be continental US, east of the Mississippi, but due to logging, have moved along the border with Canada and down the Pacific coast.

GHO is a deep hoot, Barred is “who cooks for you”, and Barn is a banshee shriek.

They can have territory of up to a few square miles, so you probably met the original one’s neighbor at the second site. 😁