The comparison that we presented to you was done by an independent sound engineering firm in Germany for AIIC International, and it compared, on four or five parameters, the audio performance of these nine different platforms.
There was one of them that was compliant with all of the parameters tested. None of them were compliant with all...and Zoom was the least compliant, earning a non-compliant grade for two out of the four parameters, all of which are really important technical things that make a huge difference in what you can and cannot hear over these platforms.
I'm sure you'll get more information—and I don't want to bore you with the technicalities—but, yes, Zoom came last.