In my limited view, the following steps/actions will have a far greater impact on the SQ, irrespective of whether a Streamer, laptop, or other device is used:
1. Headlessness
2. Fanlessness
3. Good DAC
4. Exclusive usage of device for the music software, disabling all other software and functions
5. Internal storage for your local music files on the device itself, rather than a USB or other connection to external storage (I use a Mac mini with 500GB)
6. Good software running on the device (I use Audirvana Plus)
7. Good streaming service, e.g. TIDAL
8. Clean power source through a CVT, online UPS or power conditioner
9. Well recorded media
With many of the above implemented, my computer SQ compares well with my CDP and analogue sources.
Cheers!