I guessing the difference is the 038 top cover mounting bolt is located more rearward on the cylinder and higher up than the ms380.so after looking at the photo you provided of the two saws tbohn and considered why there was a difference? AM? the answer appears to be no. technical bulletin 52.2003
ti_52_2003_01_01_01.fm shows a photo of the ms380 and farmertec has the handle, cover dead on right, screw is hidden. handle slope changed