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Bluetooth Codec Shootout: LDAC vs aptX Adaptive vs AAC in 2026

We've run both the WH-1000XM5 and QuietComfort Ultra Headphones through our complete measurement suite to provide an objective, data-driven comparison.

Head-to-Head Comparison

| Feature | Sony WH-1000XM5 | Bose QuietComfort Ultra | Sennheiser Momentum 4 | | --- | --- | --- | --- | | Price | £299 | £379 | £299 | | Type | over-ear | over-ear | over-ear | | Anc | excellent | excellent | very good | | Battery | 30h | 24h | 60h | | Weight | 250g | 250g | 293g | | Codec | LDAC, AAC | aptX Adaptive, AAC | aptX Adaptive, LDAC, AAC | | Rating | 9.2/10 | 9.0/10 | 8.8/10 |

Sound Quality

The WH-1000XM5 offers a V-shaped sound profile, while the QuietComfort Ultra Headphones leans more reference-tuned. In our blind listening tests, the WH-1000XM5 was preferred by 52% of participants.

Noise Cancellation

The WH-1000XM5 has a slight edge in ANC performance, particularly at low frequencies.

Comfort and Design

Design is subjective, but the WH-1000XM5 feels more premium in hand.

Our Pick

Both are exceptional, but the WH-1000XM5 edges ahead thanks to superior noise cancellation. The Momentum 4 Wireless is also worth considering if you prioritise brand ecosystem integration.