With all due respect, you are mixing the chaotic world of audio with the ordered and precise world of computers.
Computer systems and networks have very many controls to detect and control errors. You have acks and naks, parity, crcs etc etc all adding their bit as data flows around a computer system. From the critical sub systems, including some momery systems which are highly reliable even without error detection,, if you get an error you know about it in a catastrophic way. How you deal with the error is a different thing altogether but you are not going to get data off a hard disc without knowing whether the data is 100% correct.
Audio data is a tiny fraction of the data that flows around a computer system. Errors, jitter, whatever you want to conger up to explain the differences, are not going to make music sound more of less pleasing in the same way that the numbers in your bank account aren't suddenly going to be subtlety more beneficial without anyone knowing or you move your laptop from the sofa to your lap and your word processing document looks slightly more interesting.
Maybe you have a problem with your networks, a duff piece of equipment, a cable the bends slightly whenever you move or raise your twin store and this is causing the Sooloos system to go into error recovery mode which is causing an issue. I don't know, but hard drive jitter is isn't.
You are more likely to hear issues if someone is browsing the internet when listening to music rather than immersing the core and store in snake oil - easily rectified by correctly configuring the network.
By guess, with all due respect, is the problem with A/B listening, the placebo effect and just expecting it to all work like good old fashioned audio causing you to think you hear differences.
Anything else is simply going to go against the well understood world of computing.
2 different systems at 2 different houses?
I don't think so....