ARRIS SURFboard S34 vs Motorola B12 DOCSIS 3.1 Modem

Both are DOCSIS 3.1 cable modems with a 2.5 Gbps Ethernet port and 32x8 channel bonding, so on raw capability they are close. The ARRIS SURFboard S34 adds a second Ethernet port (1 Gbps) for a wired device or backup handoff and is explicitly tested for Cox, Xfinity and Spectrum. The Motorola B12 adds a USB-A port, is smaller, and carries a 4.7 rating from 89 owners. Pick the S34 if you want a second wired port or a brand with a long SURFboard track record; pick the B12 if you want the smallest footprint and a USB port.

• Choose the ARRIS SURFboard S34 if you want two Ethernet ports and a modem tested and qualified for Cox, Xfinity and Spectrum.
• Choose the Motorola B12 if you want the smallest modem of the two and a USB-A port alongside the 2.5 Gbps Ethernet port.