Just saw an episode of "Disappeared" about the disappearance of Colleen Orsborn. Colleen was later found deceased, although she would not be identified for 20+ years.
This case was briefly touched on in that show, because when this Doe was found, it was at first thought that she could be Colleen. So I'm guessing they died at around the same time.
The show laid out some compelling reasons why Colleen is thought by many to be a victim of Christopher Wilder, including the fact that Wilder was staying in a hotel in Daytona, where Colleen lived, the day she disappeared and checked out the next day. So could this girl be a Wilder victim?? Maybe.
Also, famed coroner Dr. Jan G. explained on the show that the original coroner's autopsy and subsequent investigation into the remains later identified as Orsborn was shoddy and did not follow proper protocols, which is why she was unidentified for so long. I do not know whether they were found in the same county, or whether the same coroner did the autopsy on both girls, but if so, it may just be that some of what we know is wrong or incomplete.
Finally, one of the Florida detectives they interviewed on the show explained that in those days a lot of runaways ended up in Daytona. He seemed to suggest that many came from places like Maryland, New Jersey, New Hampshire, and that general New England area, but certainly didn't say they came exclusively from there.
Orsborn disappeared during Spring Break in Daytona. If this girl died around the same time, she could have been a Spring Break visitor also, although usually you would think if that was the case she would have been there with friends who would have reported her missing. But I'm wondering if she could have stayed at the same hotel as Wilder.
ETA: On the show they showed the clothing this Doe was wearing and I tried to commit them to memory because I didn't remember seeing them before. The "Here Comes Trouble" T-shirt was gray with all different color letters making up the words. The other shirt/night shirt, I can't remember the background color but it was light - white or yellow or pink, maybe, and I think the letters on that shirt were also all different colors.