Hey, folks!
No. Not all digital cables sounds the same. Including HDMI/I2S.
Actually, sometimes differences in the sound of digital cables are bigger than in analog ones.
I can recommend this cable. Sounds really good. Connecting Singxer SU-6 to Audio-gd R-1NOS. Comparing to Audioquest Cinammon - Cinnamon is worse. Sound from Cinnamon is muddy, gray and flat. No saturation and no detail. Pangea sounds open and airy with good amount of detail and perfect saturation.
Minus one star for stiffness! This is not elastic cable.
Sound sample - all system elements is description.
HEADPHONES ON!!!