The digital leasures releases were cleaned during remastering I assume. The MAME team is simply capturing the original release in the best quality it can and preserving it in a lossless format. I understand what they are doing and why, but I'm not sure I agree with doubling the recorded resolution even if it might capture some lost data before as this data obviously wasn't needed to make things work. Either way, I'm happy the MAMEdevs are going to include the LD-CHDs, but at this point I'm simply not willing to use that much space for the current releases since Daphne works just fine. If things change, then I'll change as well, but that's something for down the road I guess.