Is the OnePlus Buds Pro 4 worth the upgrade from the Nothing CMF Buds 2a?
Verdict
Meaningful upgrade
The OnePlus Buds Pro 4 scores 9.5 points above the Nothing CMF Buds 2a. That's a real improvement, though not the kind you'd notice on every track. The gains are concentrated in battery (7.0 to 8.5), calls (6.5 to 7.5) and sound (8.0 to 8.5). On paper: battery life 8 h to 13 h, codecs SBC, AAC to SBC, AAC, LHDC and battery life (anc on) 5 h to 7 h. Worth checking: driver size goes 12.4 mm to 11 mm and microphones goes 4 to 3. That costs $88 more, or about $9 per point of score - reasonable value for the jump. Worth doing if you're replacing anyway; harder to justify as a pure upgrade if what you have still works.
What actually changes
Sub-scores both products have, on the same 0-10 scale. Bars extend right for a gain, left for a loss.
- Sound8.08.5
- Noise cancelling7.58.0
- Battery7.08.5
- Calls6.57.5
- Value9.09.0
Spec differences
Only where the two genuinely differ - everything they share is omitted.
| Spec | CMF Buds 2a | Buds Pro 4 | Direction |
|---|---|---|---|
| Battery life | 8 h | 13 h | |
| Codecs | SBC, AAC | SBC, AAC, LHDC | |
| Water resistance | IP54 | IP55 | |
| Battery life (ANC on) | 5 h | 7 h | |
| Battery incl. case | 35.5 h | 54 h | |
| Full charge time | 89 min | 70 min | |
| Driver size | 12.4 mm | 11 mm | |
| Microphones | 4 | 3 | |
| Case weight | 42.8 g | 50.6 g | |
| Wireless charging | No | Yes | |
| Wear detection | No | Yes | |
| ANC type | feedforward | adaptive | |
| Quick charge | 10 min → 5.5 h | 10 min → 11 h | |
| Driver | 12.4 mm driver | 11 mm dynamic | |
| Frequency response | 20 Hz - 20 kHz | 10 Hz - 40 kHz |
About this verdict
Direction matters here: this page answers "CMF Buds 2a to Buds Pro 4". The other direction is a separate question with a different answer. Scores blend published review verdicts across true wireless and shift as new reviews land, so a marginal call today may not be one next quarter.