There is far more to measured transparency than just THD+N, though this is usually a good indicator and starting point.
The DAC 1 is an old design which actually measures quite poorly, my cheap Topping DAC has SINAD (signal, noise and distortion) of 120 dB, where your former DAC1 has 104dB.
However when you look at linearity for example we see this for the DAC 1 against the measures for 3 other DAC's.
The measured IMD is also the worst of the measured bunch, though note the strange 'hump' from the ESS DAC chip on the Topping DAC.