Electrocompaniet EMC 1UP upgrade: worthwhile?

Have you compared an earlier Electrocompaniet EMC-1UP (24/192) with the most recent version (upgraded power supply, etc.)? What were your impressions? Also, did you find the addition of the Spider Clamp to be advantageous?

Thanks in advance!
I am also interested in this question. The upgrade is $800. I haven't heard convincing feedback that the spider clamp matters.
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