as far as i know it is generally called Barrett’s Esophagus not Esophagitis.
nothing can mimic its symptoms because it has no symptoms. the only symptoms are from gerd which is the cause of BE.
it is a pathological change (caused by long term gerd) that is diagnosed only by endoscopy and biopsy, never by symptoms.
its only significance is that it causes a slightly increased risk of esophageal cancer, so it requires monitoring and treatment of the gerd. the barrets esophagus itself is not treated, (and i dont think it can be reversed by treatment of the gerd).