AXR4T converters-how good?

I’m curious as to how the AXR4 converters stand up against the Apogee Rosetta and Crane Song HEDD (which i own) and other converters on the market. Has anyone actually done testing?

I have considered purchasing a high end pair of converters as most of the recording i do is one or two channels but wouldn’t want to waste the money if there would be no improvement.