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Nothing CMF Buds 2 vs Tronsmart Onyx Ace Pro: which should you buy?

On aggregated review scores the Nothing CMF Buds 2 comes out ahead with a HearWiki score of 82. The full breakdown - sub-scores, specs and what reviewers actually said - is below.

Our pick: Nothing CMF Buds 2 - Outstanding overall at around $37.

Score breakdown

Each axis is a 0–10 blend of what reviewers scored, not a lab measurement.

Nothing CMF Buds 2 leads on 6 of 7 measures.

  • Nothing CMF Buds 2
  • Tronsmart Onyx Ace Pro
HearWiki score
82
63
Sound
7.7
6.1
Noise cancelling
7.8
-
Battery
8.8
6.5
Calls
6.5
6.4
Value
9.4
-
Price (USD)
$37
$21

Generation & platform

The scores rank quality. This is the other question: is the newer one actually newer technology, or the same platform in a new shell?

Mixed generations

Nothing CMF Buds 2 (2025) against Tronsmart Onyx Ace Pro (2022). Neither is straightforwardly newer: the Nothing CMF Buds 2 brings Bluetooth 5.4 against 5.2 and ANC type Hybrid against None, while the Tronsmart Onyx Ace Pro answers with Top codec aptX Adaptive against AAC. The Nothing CMF Buds 2 answers on convenience features: it adds Multipoint pairing and Water resistance IP55 against IPX5.

  • CMF Buds 220253 yr newer
  • Onyx Ace Pro2022
What differsCMF Buds 2Onyx Ace Pro

Platform

Bluetooth
5.4
5.2
Top codec
AAC
aptX Adaptive
ANC type
Hybrid
None

Everyday features

Multipoint pairing
Yes
No
Water resistance
IP55
IPX5

Level on: USB-C.

Specifications

CMF Buds 2Onyx Ace Pro
Type
True Wireless
True Wireless
Price (USD)
$37
$21
HearWiki score
82
63
Released
2025
2022
Availability
Sold new
Discontinued
Driver
11 mm driver
13 mm dynamic
Driver type
dynamic
dynamic
Driver size
11 mm
13 mm
Drivers per side
1
1
Frequency response
20 Hz - 20 kHz
20 Hz - 20 kHz
Impedance
-
32 Ω
Bluetooth
5.4
5.2
Codecs
SBC, AAC
SBC, AAC, aptX, aptX Adaptive
Multipoint pairing
Yes
No
Latency
110 ms
-
Wireless range
10 m
10 m
Battery life
13.5 h
6.5 h
Battery life (ANC on)
7.5 h
-
Battery incl. case
55 h
27 h
Full charge time
93 min
90 min
Quick charge
10 min → 4 h
-
Wireless charging
No
No
Active noise cancelling
Yes
No
ANC type
hybrid
-
Transparency mode
Yes
-
Companion app
Yes
-
Custom EQ
Yes
-
Wear detection
Yes
-
Controls
touch
touch
Voice assistant
Yes
Yes
Weight
4.5 g
4 g
Case weight
41.5 g
37 g
Water resistance
IP55
IPX5
USB-C
Yes
Yes
Microphones
6
4
Call noise reduction
-
Yes
Call NR technology
-
cVc 8.0

What reviewers said

Nothing CMF Buds 2

The Nothing CMF Buds 2 are an exceptional budget true-wireless option, packing a surprisingly rich feature set for their low price. They deliver engaging sound, robust battery life, and effective hybrid ANC, making them a top-value pick for most listeners.

  • Pro:Excellent value for the price
  • Pro:Strong battery life with ANC off
  • Pro:Effective hybrid active noise cancellation
  • Con:Call performance weak in noisy settings
  • Con:ANC and gaming latency not class-leading
  • Con:No wireless charging support

Tronsmart Onyx Ace Pro

The Tronsmart Onyx Ace Pro is a budget-friendly true wireless earbud that focuses on long battery life and improved sound over its predecessor. It offers a handy gaming mode and a stable wireless connection, though its physical fit may not suit everyone. With no active noise cancellation, it relies on passive isolation, which is a notable limitation for some users.

  • Pro:Long battery life with the charging case
  • Pro:Improved sound quality over the previous model
  • Pro:Responsive gaming mode
  • Con:No active noise cancellation
  • Con:Fit can be awkward or slip in some ears
  • Con:Sound isolation is weak

Summaries are AI-condensed and paraphrased from published reviews and specs - not original hands-on testing. More on our method.

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