Choose the Sonos Arc if you want immersive Atmos, easy Sonos setup, and a soundbar you can expand with Sub and surrounds. Skip it if price, HDMI passthrough, Bluetooth, or...
Pros: Value for money, Dolby Atmos height effects
Cons: Audio format support, Video passthrough support
Choose the Sonos Roam 2 for compact, waterproof Sonos audio with Wi-Fi, AirPlay and easy Bluetooth. Skip it if longer battery life, lower price, bigger bass or speakerphone features matter...
Pros: Frequency response balance, Setup simplicity
Cons: Battery life (if portable), App reliability