Both are Sonos, from different ranges - so the house sound is shared and the differences are mostly in scale, engineering and price.
| Area | Better | Why |
|---|
| Connections | B | Sonos Five adds Wi-Fi and streaming. |
| Size | depends | Sonos Era 300 2 pack is easier to place; Sonos Five is bigger, which usually goes with fuller bass. Your room decides. |
| Expandability | B | Sonos Five: a sub output. |
| Price | A | Sonos Era 300 2 pack is cheaper - $758 against $1,098, about 31% less. |
A Sonos Era 300 2 pack 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?
The usual trade-off: Sonos Five measures better, Sonos Era 300 2 pack costs about about 45% more% less. Whether that gap is worth the money is the call only you can make - and in a normal room it is often smaller than the numbers suggest. In a large or open-plan room, Sonos Five has the cabinet volume to fill it more easily; in a small room, near a wall or at desk distance, Sonos Era 300 2 pack is the easier speaker to get right. Think about the whole system, not just the speakers: the roughly $340 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.