Korean Air Skypass - ORD to ICN - any flat bed seats in Business Class?

I received a quote from a travel agent to fly in June to ICN.

The aircraft is 77W which seems to be 777-300 for both to & from Chicago.

Are the business class seats old Prestige Plus and not Sleeper?
Do they ever change aircraft at the last minute? (This seems to happen at LAX.)

ORD is the 77W Prestige Sleeper. I would guess you'll get some advance notice of any equipment change, since the alternative aircraft they would send to ORD have much smaller J cabins than the 77W. There is a 772 subfleet with Prestige Sleeper that seems to fill in if they down gauge from 77W. LAX gets more equipment subs because of the volume of flights that KE puts through there and generally having a Prestige Sleeper alternative if people want to change. That's not so much an option out of ORD.

Thank you. I ended up calling KE today and they confirmed that these are Sleepers - June is high season, requiring 60,000 points.