These sit in different price classes - Sonos Five costs roughly 1.8x what Q Acoustics M20 HD does. Expect it to lead on paper; the question is whether the gap is audible enough in your room to be worth it.
| Area | Better | Why |
|---|
| Connections | A | Q Acoustics M20 HD adds Bluetooth and digital inputs; Sonos Five adds Wi-Fi. |
| Size | depends | Similar cabinet size - neither is easier to fit. |
| Expandability | depends | Q Acoustics M20 HD: a sub output; Sonos Five: a sub output. |
| Price | A | Q Acoustics M20 HD is cheaper - $599 against $1,098, about 45% less; arguably a different class. |
A Q Acoustics M20 HD B Sonos Five
depends neither is better in the abstract - it turns on your room, your system or how you will use them. Only specs published for both speakers are judged; anything missing on either side is left out rather than guessed.
Which should you choose?
Q Acoustics M20 HD has the edge on paper, though the margin is not large. The rows marked "depends" may matter more to you than the score does. Think about the whole system, not just the speakers: the roughly $499 saved by taking the cheaper pair would buy a subwoofer or a better amplifier, and either usually does more for the sound than the difference between these two.
And remember what a spec sheet cannot show: how each looks in your room and whether the finish suits it, what dealer support and warranty are like where you live, and how they actually sound to you. If you can hear them first - ideally with your own music - that will tell you more than any number above.