Doyusha used the same mold as Entex; the first manufacturer has been Nitto Kagaku (very nice pictures on the boxes, larger boxes, many airlines decals: Pan Am, KLM, Air France, British, Lufthansa, BOAC, JAL, ANA, United). Entex used average dimension boxes, cheeper, and less interesting pictures on them; the liveries were United and TWA. Doyusha, the only manufacturer using now those molds, has smaller boxes, pictures only on the JAL 747 box; Decals are: JAL, ANA, United, British, Lufthansa.
No differences in molds, but there are different colours in plastic materials as regard to the main deck: grey for Entex, white for Doyusha. Some other parts are also in light grey for Entex.
Very detailed kits, require a lot of time to be built, but the result is wonderful. Decals' quality could be better; older kits sometimes have rare but damaged decals; no availability of ready made decals, but if you wish, you can buy custom made decals: F-decal and Drawdecals. bye.
www.geocities.com/the_1_100_airliners_web