Soundcore AeroFit 2 vs Bose Ultra Open Earbuds (2nd Gen)

How they differ in real use

Built from our open ear earbuds for running scoring, each product's published specifications, and verified owner feedback — not hands-on testing.

Both the Soundcore AeroFit 2 and the Bose Ultra Open Earbuds (2nd Gen) made our Top 5 Open-Ear Earbuds for Running, at #4 (best budget) and #5. The value pick: IP55, 10 hours per charge and 42 with a wireless case, LDAC and multipoint for less than half the price of the OpenFit 2+, with more than 3,800 Amazon ratings. Its four-position adjustable hooks are something no Shokz here offers, which helps runners whose ears do not suit a fixed hook. It ranks below the three Shokz because reviewers are more divided on its stability at speed (Mezha found the buds large for hard running) and its calls and controls get less praise. It ranks above the Bose on fit for running, an IP55 rating against IPX4, and price. The newest pick (on sale October 1, 2026) and the best for sound away from the run: Gizmodo called it a clear step up from the original, with deeper bass, TrueSpatial head-tracked audio and a tighter clip. It ranks last for running because its IPX4 rating is the lowest here (every other pick is IP55), Bose markets it for travel and office rather than training, and a clip-on cuff is less locked-in than the Shokz hooks or the OpenRun band. It is also the most expensive pick. Choose it over the AeroFit 2 only if your runs are easy and sound quality comes first.

We score open-ear earbuds for running on Running Stability (25%), Sound Quality (20%), Sweat & Weather Resistance (15%), Battery & Charging (15%), Controls & Calls (10%) and Value (15%). On that basis the Soundcore AeroFit 2 totals 7.8 out of 10 and the Bose Ultra Open Earbuds (2nd Gen) 6.7. The widest gap is Value, where the Soundcore AeroFit 2 scores 10 against 5 for the Bose Ultra Open Earbuds (2nd Gen): fit, sound and features per dollar at the current Amazon price. Sweat & Weather Resistance also separates them: 9 for the Soundcore AeroFit 2 versus 6 for the Bose Ultra Open Earbuds (2nd Gen). The Bose Ultra Open Earbuds (2nd Gen) claws back ground on Sound Quality and Controls & Calls.

On paper, the specifications that actually differ: Design: True wireless ear hooks, 4-position adjustable on the Soundcore AeroFit 2 versus Clip-on cuff on the Bose Ultra Open Earbuds (2nd Gen); Audio: 20 x 11.5 mm racetrack driver, LDAC on the Soundcore AeroFit 2 versus Updated transducer with TrueSpatial immersive audio and head tracking on the Bose Ultra Open Earbuds (2nd Gen); Battery (Buds): Up to 10 hours on the Soundcore AeroFit 2 versus Up to 9 hours (5 with Immersive Audio) on the Bose Ultra Open Earbuds (2nd Gen); Battery (Total): Up to 42 hours with case on the Soundcore AeroFit 2 versus Up to 28 hours with case on the Bose Ultra Open Earbuds (2nd Gen); Water Resistance: IP55 on the Soundcore AeroFit 2 versus IPX4 on the Bose Ultra Open Earbuds (2nd Gen); Bluetooth: 5.4 on the Soundcore AeroFit 2 versus 5.4, aptX Adaptive on the Bose Ultra Open Earbuds (2nd Gen). They match on Multipoint.

Check current pricing at the merchant links below. Owners praise the Soundcore AeroFit 2 for four-position adjustable ear hooks, a fit adjustment none of the Shokz buds here offer and IP55 with 10 hours per charge and 42 hours from a wireless charging case; the most common complaint is mezha found the buds large for intense running; stability reports are more mixed than for the Shokz. Owners praise the Bose Ultra Open Earbuds (2nd Gen) for updated drivers for deeper bass plus TrueSpatial head-tracked audio; Gizmodo praised the sound and extra volume and clip-on cuff sits outside the ear canal and is comfortable for all-day wear; the most common complaint is rated only IPX4, below the IP55 of every other pick here.