Notevenclose, weiss 202, audiolab mdac, gustard a18, soncoz sgd1, pi with Ian Canada dual 9038, smsl400 and a few others.
Interesting. I'm not really familiar with the others, but I believe both the Weiss and Audiolab use ESS chips? Is that the case with others on your list?
John Kenny of Ciunas Audio has an interesting theory, mentioned on this very forum a year or three back, that there's a design flaw in ESS chips which effectively means they tend not to show up differences between cables.
FWIW, I own 2 DACs, one by CEC, which uses an ESS chip, the other by Job Systems (Goldmund) which does not. One of these DACs shows clear, consistently identifiable differences between USB cables, the other does not.
I was puzzled when I first bought the CEC, which replaced a Metrum, because with it my then preferred £350 Oyaide cable didn't really sound any different to cheaper alternatives from Oyaide, Atlas and QED (if anything it sounded a bit too bright).
With the Metrum there had been clear differences.
Bottom line is I came to consider that the whole USB audio thing should be treated as a complete 'subsystem,' in the manner of turntable, arm, cartridge and phono stage.