Bose QuietComfort 45/QC45 Wireless vs Bose QuietComfort Ultra Headphones Wireless

The Bose QuietComfort Ultra Headphones Wireless have the edge over the Bose QuietComfort 45/QC45 Wireless. While both models look similar, there are a couple of changes. The Ultra are better built and have a different control scheme with a volume slider. They also have CustomTune technology, which automatically adjusts their sound, and noise cancelling performances based on your unique hearing characteristics and environment. They support Immersive Audio, too, which is an adjustable head-tracking feature that can create a more immersive sound. The QuietComfort Ultra Headphones have a greater codec selection, including aptX Adaptive. That said, the Ultra need to be powered on to be used via analog, while the QC45 support passive playback.