Originally Posted by
WineCountryUA
Those are all the same aircraft -- just different routes.
UA presently only flies two versions of the 752 -- the
16BF sCO and the
28 BF sUA version.
As sCO version is ETOPS qualified, it is used on TATL and other routes.
At least a couple of the sUA 752s are ETOPS, but aren't generally used for such.