The ZEN DAC Signature V2 is a upgraded version of the original. It now has a 16 core XMOS chip, rather than 8 core. This means faster processing and the ability to be a MQA decoder rather than just a renderer. It also has an upgraded crystal clock with 20dB better performance.
Both products are similar to our ZEN DAC and both these products share the same core platform, but the Signature range has it pushed significantly further to achieve better sound performance.