An AES/EBU cable requires a characteristic impedance of 110 ohms. I can see that the raw cable from DH Labs is asserted to adhere to that .
Looking at the otherwise very interesting XLR microphone cables ( there is no AES/EBU specific cable listed) on the Audio Envy website I found that impedance is not a parameter disclosed.
Of course the absolute requirement for 110 ohms impedance is compromised by the fact that the XLR connectors do not maintain the correct impedance to the receptacle. Further the typically short lengths used for domestic audio setups also reduces the need to be text book correct.
So, personally , I would go the DH labs route. Not because it is absolutely necessary but I would just feel happier that the cable was in the right ball park, as it were.
of course none of these considerations will predict the way it will actually sound in your system.