ahhh, ok I get what you're saying. And it's not "12S", it is "i2s". (not one two s). i2s is a way of transmitting raw 2-channel PCM data without having to encode it into an s/pdif data format. It basically skips that step. It is a prioprietary transfer method and the connections are different between manufactureres. Some manufacturers use HDMI cable to connect this, but it is NOT an HDMI interface. It only uses the cable to transmit a different type of signal.
In this situation, I can totally see where you would like the Tartan better. It has two advantages here - it is made from pure copper (cheap copper, but still copper). The Wire World Platinum has two problems. 1 - it is pure silver (which will affect the sound). 2 - it uses DNA Helix configuration, which is 2 x 26awg twisted wires to transmit each HDMI data pin. This causes small timing problems because the two 26awg conductors are never going to be exactly the same length. It could affect data and waveform timing / rise time.
The Tartan will definitely sound warmer because of these two characteristics. If you are looking for a better HDMI cable for i2s that shares the Tartan approach, try a Purist Audio Design HDMI. It uses much better copper - 24awg long grain copper conductors that are triple-shielded.