What's the difference between a hospital-grade pump and a wearable pump?

Hospital-grade pumps like the Spectra S1/S2 and Medela Symphony use a powerful closed-system motor and corded or large-battery designs that reviewers consistently say empty the breast most effectively. Wearable in-bra pumps (eufy, Momcozy, Paruu) trade some suction strength and output for hands-free convenience and discretion. Across the communities we read, many exclusive pumpers keep a Spectra as their primary pump and a wearable for on-the-go sessions.