Bose QuietComfort Ultra Headphones (2nd Gen) vs Bowers & Wilkins Px7 S3

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QuietComfort Ultra Headphones (2nd Gen) compared with Px7 S3

	BoseQuietComfort Ultra Headphones (2nd Gen)	Bowers & WilkinsPx7 S3
Overview
Released
Released	September 2025	April 2025
Sound
Type
Type	Over-ear	Over-ear
Noise cancelling
Noise cancelling	Yes	Yes
Transparency mode
Transparency mode	Yes	Yes
Driver size
Driver size	–	40 mm
Spatial audio with head tracking
Spatial audio with head tracking	Yes	–
Bluetooth codecs
Bluetooth codecs	SBC, AAC and aptX Adaptive	SBC, AAC, aptX, aptX Adaptive and aptX Lossless
Lossless over USB-C
Lossless over USB-C	Yes	Yes
Drivers
Drivers	–	40 mm dynamic full-range biocellulose drive units, angled towards the ears; dedicated discrete headphone amplifier; Bowers & Wilkins DSP with 24-bit/96 kHz processing
Noise cancelling detail
Noise cancelling detail	Quiet Mode (full noise cancelling) and Aware Mode with ActiveSense, now smoother at damping sudden noise spikes; noise cancelling adjustable or fully off in the Bose app; CustomTune tailors sound and noise cancelling to your ears; wind block in custom modes	Eight microphones (two measure each drive unit's output, four monitor outside noise, two for voice); noise cancelling On, Pass-Through or Off from the Quick Action button or the Music app
Audio features
Audio features	Bose Immersive Audio (Still keeps the virtual speakers in place as you turn your head; Motion lets them follow) and Cinema Mode; up to seven custom modes; adjustable EQ in the Bose app; lossless USB-C audio at 16-bit, 44.1 or 48 kHz; aptX Adaptive with Snapdragon Sound devices, which Bose says adapts to lossless audio and low latency; Gaming Mode	aptX Adaptive 24/96 and aptX Lossless (Snapdragon Sound); also aptX HD; 5-band EQ with presets, or True Sound mode; USB-C audio interface; spatial audio and LE Audio with LC3 and Auracast promised as later updates
Battery
Listening time (maker's claim)
Listening time (maker's claim)	Up to 30 hours	Up to 30 hours
Battery life detail
Battery life detail	Up to 23 hours with Immersive Audio on; up to 45 hours with noise cancelling and Immersive Audio off; tested by Bose at 75 dB SPL; low-power standby when laid flat or put in the case; can be used while charging	Rechargeable lithium-ion battery; 30 hours of wireless streaming with noise cancelling on at average volume; full charge takes up to 2 hours
Fast charging
Fast charging	15 minutes gives up to 3 hours with noise cancelling on and Immersive Audio off (Bose's test footnote gives 2.5 hours); full charge in up to 3 hours	15 minutes for up to 7 hours
Design
Weight
Weight	264 g (better)	300 g
Bluetooth
Bluetooth	5.4	5.3
Two devices at once
Two devices at once	Yes	Yes
Headphone cable
Headphone cable	Yes	Yes
Controls
Controls	On the right ear cup, a Bluetooth/power button, a multi-function button (play, pause, skip, calls and modes) and a capacitive volume strip (swipe for volume; touch and hold for a shortcut to Immersive Audio settings, Spotify Tap or the voice assistant); on-head detection pauses and resumes audio, answers calls and wakes the headphones	Volume up, volume down and multi-function buttons on the right ear cup; power switch and Quick Action button (noise cancelling modes or voice assistant) on the left; wear sensors in both ear cups pause and resume playback
Microphones
Microphones	Four microphones for calls, two on each ear cup	Eight microphones in total, all used for calls; ADI Pure Voice call processing
Fit and ear tips
Fit and ear tips	Around-ear (circumaural) with an adjustable headband; removable protein leather cushions; plastic and aluminium build with polished metal yokes; folds for the carry case	Over-ear; leather and aluminium; ear cushions and headband replaceable by trained service engineers
Works with
Works with	Bose app for iOS and Android; multipoint connection to two devices; Google Fast Pair; Spotify Tap; SimpleSync with a Bose Smart Soundbar or Bose Smart Speaker	Bowers & Wilkins Music app for iOS and Android; Google Fast Pair; two devices at once; USB-C sound output for computers and phones; analogue input through the USB-C port with the supplied cable (Bluetooth disconnects)
Colours
Colours	Black, White Smoke, Driftwood Sand and Midnight Violet at launch; Bose UK now also sells Cherry Chocolate, Desert Gold and Olive Green	Anthracite Black, Canvas White, Indigo Blue, Frost Blue, Vintage Maroon
In the box
In the box	Headphones, carry case, 3.5 mm to 2.5 mm audio cable, USB-C to USB-C cable (99 cm), safety sheet	Headphones, carry case (177 x 60 x 234 mm), 1.2 m USB-C to USB-C cable, 1.2 m USB-C to 3.5 mm audio cable, document pack