Sonos Era 300 outperforms the Bose Smart Speaker 500 with six drivers and Dolby Atmos support versus the Bose's two full-range drivers and stereo-only output per RTINGS and CNET reviews. The Era 300 also integrates better into multi-room setups while the Bose 500 excels only in compact voice playback. This makes the Sonos the stronger choice for most users seeking modern audio features.