They`re all made by Samick (or was it Cort?) just a few feet from another, is this really that surprising??
Nobody "develops" cheap imports and hasn`t since the 80s. They just take features already offered on that style of body in the same factory and mix and match, then have their logo put on. There are only 2 large guitar manufacturers in korea IIRC, practically nobody owns their own plant, those 2 ghostbuild literally almost everything.