they are pretty much identical experiences...i personally prefer the 752 just because i get stuck on 762/3/4 just about everytime i fly. DL
MD88 are good airplanes, i especially enjoy these airplanes because rows 1-15 are practically silent. even on takeoff and landing, there is almost zero engine noise. Not to mention the seats are comfortable and seat pitch is generous (except the one ship with the new interior, the new seats aren't broken-in and are hard as rocks.)
Side note: I don't think DL
offers IFE to boston other than their generic show "delta horizons," but i could be wrong.