I will have both. My SM Universal should be in my hands tomorrow. Unfortunately I am travelling and will only be able to a/b both sometime next week. However from anecdotal accounts of the SM, it is tuned very differently from the Hook-X. Also going by CA's track record, you would not expect a reference tuning from the SM. My understanding of what to expect of the SM is that it is aggressive and places you amongst the band as opposed to being an observer. It is a detail monster and does not appeal to many OOTB. It also has some of the best slam especially in the bass. It is very tip, cable and source dependent and some have had to dial it in before they begin to understand the SM. It apparently pairs the best with POP and soul music more so than orchestral and jazz.I would be curious if anyone has heard/has the Supermoon and has the Hook-X.
I am super excited to hear the SM for myself!