I have heard a rumour that the MIJ CE-2�s was more carefully adjusted (trimpots inside) and that some MIT wasn�t that good adjusted. I don�t know if it�s true, but I have had both black label and green label MIJ and to my ears they sound the same. Well, there�s more mojo to a silver screw
That doesn't sound very likely. The trimming procedure outlined in the schematic is pretty simple and doing a sloppy job takes just as much time as doing it accurately.