I am not quite sure as a matter of fact. Having in mind the long term relations between Hemus Air and Albanian Airlines there is not much, which can surprise me.
But anyway (as far as the information I got) it is gong to be a BAC airplane, operated by BAC crew. Although it is quite possible that it was first leased to Hemus Air and than to Albanian. Otherwise Hemus Air can enter the Guiness Book of records if we compare the total number of paseengers carried to the different type of airplanes they operate with.
Although there are not Tupolev 134 back, let us not forget Yak 40, TU5, ATR 42 (VM), BAe 146 and now MD 82 no way. But some times normal logic does not apply to DU. Who knows?
P.S. All BAC MD's are going to be with 164 seats for the summer season.