This Quote from Cunard at least implies that 'Repatriation', and 'Emergency Evacuation' are not the same thing.
"When travelling with us, your insurance must include medical and repatriation cover for not less than 2 million GBP minimum, including cover for emergency evacuations and full cover for pre-existing medical conditions in the countries you are due to visit."
I read that as Repatriation being, as you said, from whatever hospital, in whatever country you were disembarked in, to a hospital in your home country. And Emergency Evacuation being from ship to shore. And Cunard require UK passengers to have insurance cover for both.