Bose QuietComfort 35 II vs Bose QuietComfort Ultra Headphones

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QuietComfort 35 II compared with QuietComfort Ultra Headphones

	BoseQuietComfort 35 II	BoseQuietComfort Ultra Headphones
Overview
Released
Released	September 2017	October 2023
Sound
Type
Type	Over-ear	Over-ear
Noise cancelling
Noise cancelling	Yes	Yes
Transparency mode
Transparency mode	–	Yes
Spatial audio with head tracking
Spatial audio with head tracking	–	Yes
Bluetooth codecs
Bluetooth codecs	SBC and AAC	SBC, AAC and aptX Adaptive
Lossless over USB-C
Lossless over USB-C	–	No
Noise cancelling detail
Noise cancelling detail	High, Low and Off settings in the Bose Connect app or via the Action button; defaults to High on power-up; no dedicated transparency mode described in the maker's guide	Eight microphones for feedback and adaptive feed-forward noise reduction; Quiet, Aware and Immersion modes plus custom modes; Aware Mode with ActiveSense briefly applies noise cancelling during very loud sounds; noise cancelling adjustable in the Bose app; Wind Block setting; CustomTune calibrates sound and noise cancelling to your ears each time you put them on
Audio features
Audio features	No custom equaliser in Bose Connect (SoundGuys); SBC and AAC codecs confirmed by SoundGuys	Bose Immersive Audio (Still keeps the sound in place as you turn your head; Motion lets it follow) using an onboard IMU; three-band EQ (bass, mid-range, treble) in the Bose app; aptX Adaptive with Snapdragon Sound devices
Battery
Listening time (maker's claim)
Listening time (maker's claim)	Up to 20 hours	Up to 24 hours
Battery life detail
Battery life detail	Up to 20 hours wirelessly or 40 hours using the supplied audio cable; headphones do not play while charging; analogue listening remains possible with a depleted battery	Up to 24 hours with Immersive Audio off, 18 hours with it on; tested by Bose at 75 dB SPL in Quiet Mode; the headphones don't charge while switched on
Fast charging
Fast charging	Full charge in up to two hours (current owner's guide); What Hi-Fi reports 15 minutes provides 2.5 hours of wireless listening	15 minutes gives up to 2.5 hours with Immersive Audio off, 2 hours with it on (owner's guide; Bose UK's FAQ says 3 hours); full charge in up to 3 hours
Design
Weight
Weight	–	254 g
Bluetooth
Bluetooth	4.1	5.3
Two devices at once
Two devices at once	Yes	Yes
Headphone cable
Headphone cable	Yes	Yes
Controls
Controls	Power/Bluetooth slider, volume buttons and multi-function button on the right earcup; left Action button can control noise cancellation; multi-function button accesses the phone's voice control	On the right ear cup, a Bluetooth/power button, a multi-function button (play, pause, skip, calls, modes) and a capacitive volume strip (swipe for volume; touch and hold for a shortcut to Immersive Audio settings, Spotify Tap, the voice assistant or battery level); on-head detection pauses and resumes audio and wakes or sleeps the headphones
Microphones
Microphones	Built-in microphone system for calls and voice assistants; maker's launch announcement describes voice pickup but does not publish a microphone count	Eight microphones in total; four are used for calls (two on each ear cup), in a beamforming array
Fit and ear tips
Fit and ear tips	Around-ear cushions; headband folds and earcups rotate for the supplied carry case	Around-ear (circumaural) with an adjustable headband; removable protein leather cushions; plastic, aluminium and protein leather; fold flat for the carry case
Dimensions
Dimensions	SoundGuys reports 235.3 g and 180 × 170 × 81 mm; What Hi-Fi's table gives 240 g; no current maker headphone weight was verified, so the main weight field is left out	–
Water resistance detail
Water resistance detail	No IP rating verified in the maker documents used; owner's guide says not to use near water	No water resistance rating published
Works with
Works with	Bose Connect app for iOS and Android; two active Bluetooth devices, one audio stream at a time, with eight stored pairings; NFC pairing; SimpleSync with compatible Bose speakers and soundbars; Bluetooth 4.1 confirmed by TechRadar; Google Assistant is not available on iOS according to Bose's current article; current maker product page also lists Amazon Alexa, subject to country and language availability	Bose app (launched with Bose Music) for iOS and Android; multipoint connection to two devices since a July 2024 update; Google Fast Pair; Spotify Tap; SimpleSync with Bose smart soundbars and speakers; 2.5 mm analogue input needs the headphones powered on; no USB audio
Colours
Colours	Black and Silver at launch	Black and White Smoke at launch; What Hi-Fi lists later Lunar Blue and Diamond 60th Edition finishes
In the box
In the box	Headphones, carry case, USB charging cable and analogue audio cable; micro-USB charging connector; 2.5 mm headphone to 3.5 mm device audio cable (TechRadar)	Headphones, carry case, 3.5 mm to 2.5 mm audio cable, USB-C (A to C) cable (50.8 cm), safety sheet