Another upgrade to purify the signal would be a dedicated streamer with USB out to get away from laptop signal noise. Plug the aptX dongle into the output and you might (might) get an improvement.
No noise in the digital signal whatever the source (unless you’re talking about jitter, which is of negligible effect compared to Bluetooth compression and wireless signal issues).
With all other things being equal, my streamer sounds better than my macbook, which sounds better than my budget windows laptop. Just my experience. Haven’t tried it with Bluetooth.
Another upgrade to purify the signal would be a dedicated streamer with USB out to get away from laptop signal noise. Plug the aptX dongle into the output and you might (might) get an improvement.