Focal Bathys Mg wins on audio fidelity with its 40mm magnesium drivers and 24-bit/192kHz USB-DAC mode (per Focal 2025 specs) while Sennheiser Momentum 4 Wireless counters with 60-hour battery versus 30 hours. The $1299 Focal targets audiophiles needing wired resolution; Sennheiser suits travelers. Focal takes the edge in performance and features.