Bose QuietComfort 35 II vs Bose QuietComfort Ultra Earbuds

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QuietComfort 35 II compared with QuietComfort Ultra Earbuds

	BoseQuietComfort 35 II	BoseQuietComfort Ultra Earbuds
Overview
Released
Released	September 2017	October 2023
Sound
Type
Type	Over-ear	In-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
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	Quiet Mode (full noise cancelling), Aware Mode and Immersion Mode, plus custom modes with noise cancelling levels in between; CustomTune tailors sound and noise cancelling to your ears
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); three-band EQ in the Bose app; aptX Adaptive with Snapdragon Sound devices, normally at 44.1 kHz and up to 48 kHz for high-resolution listening, with a low-latency mode
Battery
Listening time (maker's claim)
Listening time (maker's claim)	Up to 20 hours	Up to 6 hours
With the case
With the case	–	Up to 24 hours
Wireless charging
Wireless charging	–	No
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 6 hours per charge with Immersive Audio off, 4 hours with it on; the case holds three full charges; tested by Bose at 75 dB SPL in Quiet Mode
Charging case
Charging case	–	USB-C; earbuds charge in up to 2 hours, the case in up to 3 hours; an optional silicone case cover (sold separately) adds wireless charging
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	20 minutes in the case gives up to 2 hours of playback
Design
Weight (each earbud)
Weight (each earbud)	–	7.7 g
Water and sweat resistance
Water and sweat resistance	–	IPX4
Bluetooth
Bluetooth	4.1	5.3
Two devices at once
Two devices at once	Yes	Yes
Headphone cable
Headphone cable	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	Touch surface on each earbud (tap to play, pause or answer calls; double-tap to skip forward or end calls; triple-tap to skip back; swipe up or down for volume; touch and hold for a shortcut to switch modes or the voice assistant)
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	Adaptive microphone system with adjustable self-voice; TechRadar counts four microphones per earbud
Fit and ear tips
Fit and ear tips	Around-ear cushions; headband folds and earcups rotate for the supplied carry case	Silicone eartips in small, medium and large (medium fitted); stability bands in sizes 1, 2 and 3 (size 1 fitted), with a notch that aligns them on the earbud; extra-small and extra-large sizes available from Bose Support; either earbud can be used on its own
Case weight
Case weight	–	0.132 lb (about 60 g)
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	IPX4 for the earbuds; the inside of the case resists water left on the earbuds, but Bose advises keeping the outside of the case dry
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; SimpleSync with Bose smart soundbars and speakers
Colours
Colours	Black and Silver at launch	Black and White Smoke at launch; Bose UK now sells Lunar Blue
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)	Earbuds, charging case, eartips (small and large; medium fitted), stability bands (sizes 2 and 3; size 1 fitted), USB-C to USB-A cable