A comparison of specs, key information, reviews, and best pricing from top retailers
Last updated -- hours ago | Report incorrect information
Company ProductName Specs
Company ProductName Specs
What we think
The PerfectRec Earbuds or Headphones team Learn more
Updated April 10, 2024·
If you prioritize noise isolation, comfort, and are willing to pay a premium for top-notch build quality, the Bose QuietComfort Ultra Earbuds would be an ideal choice for you, especially if you need wireless functionality with aptX Adaptive codec support and enjoy features like an app equalizer and active noise cancelling. However, for budget-conscious customers looking for a wired connection with a focus on sound quality and the ability to swap cables, the KZ ZSN Pro X earbuds offer good overall sound and build quality at a typically much lower price point, although they lack wireless capabilities, noise cancelling, and some of the convenient features such as ear detection and an app for customization. Give Feedback
this description is based on the product variant with some specs and product variant with some specs. At the time of writing, the variant with some specs cost some dollars and the variant with some specs cost some dollars.
Advantages of the Bose QuietComfort Ultra Earbuds
- Very good for music
- Very good for gaming
- Very good for TV and video
- Very good for exercise
- Very good for air travel
Advantages of the KZ ZSN Pro X
- The KZ ZSN Pro X has no clear advantages over the Bose QuietComfort Ultra Earbuds.
Key differences
Music
8.6
7.0
The Bose QuietComfort Ultra Earbuds is very good for music, while the KZ ZSN Pro X is good.
Gaming
8.8
5.9
The Bose QuietComfort Ultra Earbuds is very good for gaming, while the KZ ZSN Pro X is poor.
Phone Calls
5.1
3.1
The Bose QuietComfort Ultra Earbuds and KZ ZSN Pro X are both poor for phone calls, though the Bose QuietComfort Ultra Earbuds is somewhat better.
Podcasts and Audiobooks
6.0
4.7
The Bose QuietComfort Ultra Earbuds is only fair for podcasts and audiobooks, while the KZ ZSN Pro X is poor.
TV and Video
8.1
7.3
The Bose QuietComfort Ultra Earbuds is very good for TV and video, while the KZ ZSN Pro X is good.
Noise Reduction
8.9
6.0
The Bose QuietComfort Ultra Earbuds is very good for noise reduction, while the KZ ZSN Pro X is only fair.
Battery
6.5 Hours
N/A
The Bose QuietComfort Ultra Earbuds has 6.5 hours of battery life. The KZ ZSN Pro X does not have a battery.
Cost
$249
$24
$0
$50
$100
$150
$200
$250
$300
$350
The Bose QuietComfort Ultra Earbuds has a price of $249 and the KZ ZSN Pro X costs $24.
Build Quality
9.0
8.5
The Bose QuietComfort Ultra Earbuds has excellent build quality, while the KZ ZSN Pro X has very good build quality.
Let Us Help Find Your Perfect Headphones
Find your new headphones
Give feedback
We’re constantly working to improve.
How the Bose QuietComfort Ultra Earbuds and the KZ ZSN Pro X compare to other earbuds and headphones
Spec Comparison
 |  | |
| Bose QuietComfort Ultra Earbuds | KZ ZSN Pro X |
GENERAL | |||
|---|---|---|---|
| Price | |||
$249 | $24 | ||
Brand | |||
Brand | Bose | KZ | |
Release Date | |||
Release Date | September 1, 2023 | June 1, 2020 | |
Form Factor | |||
Form Factor | Earbuds | Earbuds | |
Connectivity | |||
Connectivity | Wireless | Wired | |
SOUND | |||
|---|---|---|---|
Music Score | |||
Music Score | 8.7/10 | 7/10 | |
Phone Calls Score | |||
Phone Calls Score | 5.1/10 | 3.1/10 | |
Gaming Score | |||
Gaming Score | 8.8/10 | 6/10 | |
TV and Video Score | |||
TV and Video Score | 8.2/10 | 7.3/10 | |
Exercise Score | |||
Exercise Score | 8.4/10 | 4.2/10 | |
PERFORMANCE | |||
|---|---|---|---|
Battery life | |||
Battery life | 6.5 Hours | N/A | |
Wireless charging | |||
Wireless charging | No | N/A | |
Charging time | |||
Charging time | 2 Hours | N/A | |
Bluetooth version | |||
Bluetooth version | 5.3 | N/A | |
Case Battery Life | |||
Case Battery Life | 21 | N/A | |
FEATURES | |||
|---|---|---|---|
Active Noise Cancelling | |||
Active Noise Cancelling | Yes | No | |
Noise Reduction Score | |||
Noise Reduction Score | 8.9/10 | 6/10 | |
Virtual Surround | |||
Virtual Surround | Yes | No | |
Android App | |||
Android App | Yes | N/A | |
iOS App | |||
iOS App | Yes | N/A | |
Mic Quality | |||
Mic Quality | 6.2/10 | 2.5/10 | |
BUILD AND DESIGN | |||
|---|---|---|---|
Build Quality | |||
Build Quality | 9/10 | 8.5/10 | |
Comfort score | |||
Comfort score | 8.4/10 | 7/10 | |
Size | |||
Size | Medium | Large | |
Weight (headset or single earbud) | |||
Weight (headset or single earbud) | 7.7 Grams | 27 Grams | |
Microphone style | |||
Microphone style | Integrated | N/A | |
Shopping
Bose QuietComfort Ultra Earbuds
See more
Dig into reviews and images
Soundguys
Christian Thomas | October 2023
"Bose put the time in to fix the major issues with the previous earbuds, and the Bose QuietComfort Ultra Earbuds are very befitting of its price point. While you might be tempted to save a few bucks and go with the Bose QuietComfort Earbuds II on sale, fight the urge. There are enough upgrades here to justify the newer model."
KZ ZSN Pro X
See more
Dig into reviews and images
Soundguys
Jasper Lastoria | April 2023
"The KZ ZSN PRO X offers superb sound for very little money, like under $30 USD. It has some rough edges with a plastic seam on the cable that can rub on your ear, and the bud is a bit large. The tech isn't cutting edge, but new doesn't always equal better. You should try it."
Get a great deal on the Bose QuietComfort Ultra Earbuds or the KZ ZSN Pro X
About Bose
Bose is an American audio equipment manufacturer based out of Framingham, Massachusetts. Founded in 1964 by Amar Bose with the goal of creating a speaker system that could accurately recreate the sound of a concert hall, Bose has become one of the most prominent players in the modern consumer audio market due to the premium feel of their products and their wide brand recognition.
Give feedback
We're constantly perfecting our model
Earbuds or Headphones guides you might be interested in
More comparisons for you
Compare Bose QuietComfort Ultra Earbuds vs. Sennheiser Momentum 4
VS
Compare Bose QuietComfort Ultra Earbuds vs. Sennheiser Momentum True Wireless 3
VS
Compare Bose QuietComfort Ultra Earbuds vs. Grado GT220
VS
Compare KZ ZSN Pro X vs. KZ ZSN Pro (with Mic)
VS
Compare KZ ZSN Pro X vs. JLab Go Air Pop
VS
Compare KZ ZSN Pro X vs. KZ ZSN Pro
VS
FAQs
FAQs about earbuds and headphones
Why trust us
This information was produced and vetted by the PerfectRec earbuds & headphones team. We are a product research and recommendation organization that meticulously reviews and evaluates the latest earbuds or headphones information and makes it digestible for you.
By the numbers
108
Earbuds and headphones evaluated
11,340
Earbuds and headphones stats compiled
15
Proprietary Earbuds and headphones ratings developed
127,700
Recommendations made
19,155
Consumer hours saved
About the Earbuds or Headphones team
Joe Golden, Ph.D
CEO and Earbuds and Headphones Editor
Joe is an entrepreneur and lifelong electronics enthusiast with a Ph.D in Economics from the University of Michigan.
Jason Lew
Staff Expert & Software Engineer
Jason is a staff expert and software engineer that has been making laptop recommendations for 7 years and moderates one of the largest laptop subreddits.
Chandradeep Chowdhury
Staff Expert & Software Engineer
Chandradeep is a staff expert and software engineer and expert in televisions and monitors. He’s been making monitor recommendations for ten years.
Luis Torres
Earbuds and Headphones Expert
Luis is a Mexico-based headphones expert. He’s been making headphone recommendations for five years and has close to 100 pairs in his personal collection.
Featured in
