You’ve got a good eye. Thanks for explaining the differences. ????
Any average person who spends time studying the gen and rep dials will be able to see the differences, you do not need a loupe or any special equipment to see the differences.
So whenever someone says the black dial is "closest to gen", it is highly subjective. ALL the colored variants of the rep are equally flawed, but perhaps the black obscures the tapisserie imperfections the best. That does not make it closer to gen, but rather, simply making the flaws harder to spot. Its a little like a room with all the trash and stuff strewn around vs one which is equally unkempt, but having all the mess swept under the bed. Both have the equal amount of rubbish, but it is more obviously seen in one, thats all.