Due to the connectors used, BNC-BNC is capable of providing a consistent 75 ohm connection. But since AES/EBU uses XLR connectors, I don't see how it can ever provide a fully consistent 110 ohms like it claims. So in theory BNC-BNC is the better connection. Can someone refute this and provide a reliable source?
But I have seen some BDP-1 reviews that say AES sounds better, while other reviews say BNC sounds better. I noticed that those preferring BNC claimed it sounded more detailed, while those who preferred AES often talked about the smoothness.