It's been mentioned a few times that the DLC coated milanese loop can scratch both the space black watch and the ceramic back.
Which is why I asked a forum member their experience with the black Milanese loop.
A few posts mentioned on a tech forum doesn't equate to everyone else's experience with the black Milanese loop. I'm not saying it's not possible, but it also depends how someone has treated and managed their Space black Apple Watch. I own the black Milanese and Space Black combination and have resulted in zero issues from any signs of scratching.
Then again, it's never stated the DLC coating isn't impervious to scratches from any band on the ceramic either. That said, If this is considered some flaw from Apple and one wanted to make an argument based on some investigation there was a possible defect, I'm willing to wager Apple's response would be based on two things:
1) There is No guarantee the Apple Watch wouldn't scratch based on how someone handles their Watch accordingly, no matter what the band.
2). The DLC coating isn't impervious to any band or any other object from damaging the Watch. It's merely an added layer of protection.
None the less, I'm the type of person who at least contact Apple's engineers for further analysis on this. If it's a flaw specific to this band and orientation, how is Apple to better themselves without receiving feedback, besides making anecdotal claims on a tech enthusiast site? Case in point to be honest.