I know this example is not the same, but I think it has some applicability here. I was using a pair of Cardas RCA to XLR adaptors on a pair of unbalanced interconnects where the source had xlr outputs and the amp only had rca inputs. Eventually, I had a pair of Xhadow xlr plugs installed on the interconnects at the source end. The difference in sound was obvious. The adaptors were masking detail, blurring image outlines.....probably other compromises as well. It's been a few years so I don't recall the exact differences.
If money isn't much an issue, perhaps the better sonic solution would be to use a pair of Y-interconnects.