Better 'detail' doesn't necessarily mean better sound quality, especially if Spotify is the reference. 'Greater detail' sounds more like upper frequency response aka the Spotify via PC was brighter, which I do not find surprising. That said the LX5 is an *excellent* turntable greatly overlooked as most Sony's are so I'm not surprised if it sounds better than a U-Turn.
The speaker placement doesn't give me a lot of confidence for audio evaluation. They look to be not only close to the TV but behind it as well with lots of other surfaces in front of them. And unless they are amazing drivers with a stellar crossover to a sub I have my doubts they are going to allow for an accurate comparison.
Edit: I thought they were Gallo but I see they are Orb speakers. So yeah, I'd bet they have especially poor FR, making for a difficult comparison.