Treatment is pretty much the same, the only way Lupus is differentiated from UCTD is by symptoms. See the link below, Diagnosing Lupus for more information.
Treatment for Lupus is Plaquenil, to inhibit disease progression. Prednisone, to control inflammation.
Imuran, Cellcept, or MTX to treat if Prednisone doesn't get things under control. It's not known which of these will 3 work for an individual, what works for some won't work for others, it's trial and error.
Then the newest meds, the current Big Guns for Lupus -- Benylsta and IVIG.
Unless you have some huge benefit coming from having a Lupus diagnosis, it really isn't worth worrying about
as long as you are receiving treatment and your symptoms are quiet. (Some disability insurance companies do squabble less with some diagnoses than others, but other than that I can't think of what good a different dx might do you.)
Lynnwood, Lupus & Sjogren's Moderator, Dx: 2002DIAGNOSING LUPUS & HW's LUPUS 101
"Life is far too important to be taken seriously." - Oscar Wilde