Most cars and trucks and even furniture have leather seating surfaces. If you touch it when you sit , it is probably leather. Some autos have vinly side bottoms and some have cloth. I thought my truck was all leather. Like you, I learned it had leather seating surfaces. That was for the fromt seats, the rear seats in the truck are vinyl. I don't think they call it vinyl, but is not leather.
Not sure about the Eos. I have just gotten acustomed to the new "style."