Sony LinkBuds Open vs Anker soundcore AeroFit 2

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LinkBuds Open compared with AeroFit 2

	SonyLinkBuds Open	Anker soundcoreAeroFit 2
Overview
Released
Released	October 2024	October 2024
Sound
Type
Type	Open-ear	Open-ear
Noise cancelling
Noise cancelling	No	No
Spatial audio with head tracking
Spatial audio with head tracking	Yes	–
Driver size
Driver size	11 mm	–
Bluetooth codecs
Bluetooth codecs	SBC, AAC and LC3	SBC, AAC and LDAC
Chip
Chip	V2	–
Drivers
Drivers	11 mm ring-shaped driver with a high-compliance diaphragm and high-power neodymium magnet	20 × 11.5 mm racetrack drivers with BassTurbo acoustic structure; rectangular dimensions retained rather than treating one axis as diameter.
Chip
Chip	Integrated Processor V2	–
Noise cancelling detail
Noise cancelling detail	No noise cancelling; the open-ring design lets outside sound through; Adaptive Volume Control adjusts the volume to your surroundings; Speak-to-Chat	–
Audio features
Audio features	DSEE upscaling; 360 Reality Audio with head tracking; LE Audio (LC3); BGM effect; equaliser in the app	App EQ, presets and spatial audio. LDAC requires a compatible source; it does not provide the same codec on iOS.
Battery
Listening time (maker's claim)
Listening time (maker's claim)	Up to 8 hours	Up to 10 hours
With the case
With the case	Up to 22 hours	Up to 42 hours
Wireless charging
Wireless charging	No	Yes
Battery life detail
Battery life detail	Up to 8 hours with AAC, SBC or LC3; 8 hours from the earbuds plus 14 hours from the case, 22 hours in total; talk time up to 4.5 hours; standby up to 13 hours; the equaliser, DSEE, Speak-to-Chat and Adaptive Volume Control shorten battery life	Maker FAQ: about 10 hours music at 50% volume and 42 hours including case; about 8 hours calls at 50% volume. UK introduction says 35 hours with case, but its spec table, exact FAQ and maker launch release agree on 42; 42 retained. Settings, codec and volume affect use.
Charging case
Charging case	USB-C; about 2.5 hours to fully charge the case, 1.5 hours for the earbuds; 46.0 × 46.0 × 29.4 mm	USB-C and wireless charging; 750 mAh case, about two hours for a full charge. Each earbud 70 mAh, about one hour to charge (maker FAQ).
Fast charging
Fast charging	3 minutes of charging gives about 1 hour of playback	Ten minutes charging earbuds provides up to four hours playback; fast charging is not claimed for the case.
Design
Weight (each earbud)
Weight (each earbud)	5.1 g (better)	10 g
Water and sweat resistance
Water and sweat resistance	IPX4	IP55
Bluetooth
Bluetooth	5.3	5.4
Two devices at once
Two devices at once	Yes	Yes
Controls
Controls	Wide Area Tap on the earbud or the face in front of the ear (tap twice to play or pause; three times to skip or answer calls; five or more times for volume), reassignable in the app; head gestures to answer calls; voice control; Quick Access; IR sensors pause music when an earbud is taken out	Customisable touch controls; volume control disabled by default, can be enabled in the app. No wearing detection. Case pairing/reset button.
Microphones
Microphones	A microphone on each earbud, with Precise Voice Pickup Technology and AI noise reduction for calls	Four microphones with AI call-noise reduction
Fit and ear tips
Fit and ear tips	Open-ring design held in place by Fitting Supporters; either earbud can be used on its own	Non-sealing open-ear fit with four-level adjustable ear hooks UK maker table states 10 g, identified per earbud by the exact HIFI.DE review; SoundGuys gives 8 g, so maker figure retained.
Case weight
Case weight	About 30.6 g	–
Water resistance detail
Water resistance detail	IPX4 equivalent for the earbuds, excluding the sound outlet, ventilation holes and microphone holes; the charging case is not water resistant	IP55 applies to earbuds; maker FAQ states charging case is not waterproof. Not for swimming or diving.
Works with
Works with	Sony | Sound Connect app for iOS and Android; multipoint connection to two devices; LE Audio with compatible devices; Auto Switch with the LinkBuds Speaker; Google Assistant and Amazon Alexa; Google Fast Pair and Microsoft Swift Pair; Bluetooth 5.3 Class 1, about 10 m range	soundcore app; two-device connection and single-earbud use. Current AI Translation requires app 3.8.7 or later and latest earbud firmware; this is a later feature, absent from the 2024 review software. UK store also offers a separate AI Assistant style; this entry describes the basic A3874 model.
Colours
Colours	Black, White, Violet (Olivia Rodrigo edition)	Launch Black, White, Minty Green and Abyss Blue; blue shipping planned later in 2024. Current UK labels Midnight, Champagne Mist, Jungle Green and Light Blue.
In the box
In the box	Earbuds, charging case, USB-C cable (USB-A to USB-C), documents	–