Connectivity is where the two headphones take genuinely different philosophical paths, despite sharing the same Bluetooth 5.3 foundation and identical 10 m range. The Bowers & Wilkins Px8 S2 goes deep into the Qualcomm aptX ecosystem, supporting aptX Adaptive, aptX HD, and aptX Lossless — a codec stack that enables variable-bitrate high-resolution audio up to lossless quality, but only when paired with a compatible source device. The JBL Tour One M3 takes a different route, offering LDAC — Sony's widely adopted high-res codec — alongside Bluetooth LE Audio, a forward-looking standard that improves efficiency and enables multi-stream audio. Both also support AAC and Auracast, the latter allowing broadcast audio sharing to multiple listeners simultaneously.
The practical implication of these codec differences comes down to the user's device ecosystem. Android users with a Qualcomm-powered phone will get the most out of the Px8 S2's aptX Lossless capability, while those with a Sony or other LDAC-supporting Android device will find the Tour One M3 the natural fit. The Px8 S2 also includes fast pairing, a convenience feature the Tour One M3 lacks — a small but real quality-of-life advantage for users who frequently switch between devices. The Tour One M3's LE Audio support, meanwhile, positions it better for compatibility with emerging audio standards.
Overall, this category is too ecosystem-dependent to declare a single winner, but the Px8 S2 edges ahead for most users thanks to its broader high-resolution codec coverage and the added convenience of fast pairing. Users invested in the LDAC ecosystem or eager for LE Audio compatibility will find the Tour One M3 equally compelling.