Kangnam vs. IMEX 1/35 helo kits

What difference is there between IMEX and Kangnam 1/35 helo kits - in particular the AH-64 Apache (A and D model)? From various hobby shop web sites and ebay, they would appear to be the same if box art is any clue. I have noticed a difference in price, with Kangnam sometime being a few dollars more.
Does one have better detail or quality of plastic than another?

I was wondering the same thing… any insight guys?