There are plenty of posts around the internet still claiming the KCG shaves exactly like a DE89. I have a Merkur 33c, but have never tried a DE89 or R89. I have the Maggard V3 and a Parker SB head on a 3-piece, and they are both different from each other, and different from the KCG. I was tempted to buy a real Muhle R89 or EJ DE89 when I found out the KCG was different, but for the price, and with all the razors I have, it is just not worth the dough. I'm still scratching my head why the KCG head comes with a paper in the head in German, though. Box says made in China for the handle, which people claim includes the head.
I have read neither of your posts nor have I used any of the products either of you mentioned. And I still strongly disagree with you about everything.