Candlelight Flame Ultrasonic Diffuser vs MUJI Ultrasonic Aroma Diffuser

Buy the Candlelight diffuser if you want a longer run time, a realistic flame glow and a lighter, travel-friendly unit. Buy the MUJI-style diffuser if you want set-and-forget timers and a beeping empty-tank alarm. Both are quiet ultrasonic units with warm light. Owners of the MUJI unit praise its durability and easy cleaning but say the tank is small and needs refilling often; the Candlelight's 120 ml tank runs up to 6 hours, roughly double the other's 3-hour maximum.

• Choose the Candlelight Flame diffuser if you want the longest run per fill, a flickering candle look and a compact unit you can move between rooms.
• Choose the Ultrasonic Aroma Diffuser if you want preset 30-minute to 3-hour timers and an audible alert when the tank runs dry.