The Python CX and Kubala Emotion are open and dynamic power cables which both lean slightly toward an organic and warm romantic direction without being dull.
These are two somewhat similar sounding power cables with the Kubala Emotion being slightly warmer sounding and both possessing great dynamics and natural tonation.
Which is better is probably system dependent. With the Python CX already serving my Shunyata PS8, the addition of the Kubabla Emotion to serve my Amp, became slightly too warm in my system.
The better cable is largely dependent how much you need to warm the sound in your system and what equipment is already in place. Suffice to say, both color the sound slightly warm, with the Kubala adding a little more warmth than the Shunyata Python CX.