Korean Air Skypass - KE ORD-ICN lie-flat seats-which website is correct?

I may end up taking a KE flight in early May from ORD-ICN and I have not flown KE before. My question is this, on the KE website the flight (KE 38 and my possible return KE 37) shows prestige plus, but not prestige sleeper class, but on EF when you roll over some of the seats, they state that they are the new-style, lie-flat sleeper. So has anyone flown this recently who could tell me which website is correct? Also, are all the seats (even on the upper deck) the lie-flats. I only ask, because row 16 says: standard bulkhead, upper deck business class, but row 17 says lie-flat. So are all of the upper deck seats lie-flats?
Thanks!

korean air uses 747 on this route. all of korean's 747's have the prestige plus seats which are angled, not fully flat.

Ah-yes. I seem to remember some posts about what 'lie-flat' really means. I will go with the information on the KE website. It looks like they have the "true" lie-flats out of other cities, like LAX. I may try to fly out of there instead.