Which one to buy: UpTone USB REGEN or Intona USB Isolator?

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Hi, since two weeks I use JCat USB Isolator - it is in fact Intona inside, but in nicely build aluminium cage. I use it with my Lampizator DAC and Dell laptop (i7,audio only, Daphile). Happy with the improvement! With Rega there is a small nuance I've heard. They cut the computer port to 16/48. That saying, it seems to be reasonable to buy USB/S-Pdif converter. Might improve too.