When using an optical USB cable the source device itself won't matter as no noise can pass from it to the DAC. (This is assuming it's fully isolated. AFAIK some optical USB cables retain a ground connection so some noise can still be conducted)Thank you very much for the information -- I appreciate it.
Only wanted to try that USB cable due based on the opinion of @rsbrsvp and the cost wasn't as expensive as others.
The issue is that then the optical receiver or isolation device itself can be a limiting factor for noise and in many cases will not be a particularly clean source.
The cleanest device in this category I'm aware of currently is the Intona 7055-C. But generally if possible, it's better to use a very clean grounded source like the RED vs a clean ungrounded source like an Intona 7055-C or other optical cable or isolator.