If you go to the photo search engine and under "Category" select "Editors Choice Selection" which is at the bottom of the pull-down list , leave the default sort by "Latest Additions First", and then go to the last page of the results, then this two QF
747 photo is seen on that last page.
So, yes this photo must be amongst the oldest accepted photos that are tagged with Editors' choice. However, if you compare with the other photos of similar vintage on the last page of results, one could objectively say that this QF
747s photo is really not at the same level as the others of the same vintage
with the Editors Choice tag. So perhaps you are right that it was unique at the time in that it showed two QF
747s side by side.
After I started this thread, I noticed that there are two anonymous comments against the photo commenting on the same issue. I did not write either of those comments.
The best time to plant a tree is 40 years ago. The second best time is today.