Superior interoperability with other Mesh networks

Motorola MB7621 vs Motorola MB8600

Only one peripheral may be used with the MB8600. The MB8600 may be linked to either a computer or a router. You can connect up to four devices to the MB8600 at once if your Internet service provider provides you with more than one IP address.   My May 2022 purchase of a Motorola MB8600 cable modem only has a single ethernet connector, not four. I'm disappointed since an extra port would be helpful for debugging purposes when connecting a laptop directly to the MB8600 without going through a different router. 

The MB8600 Model is built with the future in mind. It requires a router that also supports Ethernet port bonding in order to achieve its maximum throughput of over 1Gbps.  The MB8600 modem may be used with any wireless access point. Given the MB8600's speed, an AC1900 router is minimally required. Your ability to take use of a stronger wireless connection is dependent on the devices already part of your network.

Highest Multi-Gigabit Bandwidth Internet Speeds Available at Every Tier If you have a Gigabit internet connection, this is the best cable modem you can buy, says Wirecutter. The highest available Internet speeds from any cable provider are supported by DOCSIS 3.1 and DOCSIS 3.0 with 328 capacities, respectively.

Save as much as $168 annually on cable modem leasing fees by ditching that expense. (The discounts shown are for Comcast Xfinity and may not apply to other cable companies.) Approved for use with Comcast Gigabit services, Cox Gigablast, and Xfinity from Comcast and Xfinity from X1, Cox, and CableOne. problem with RCN compatibility.

(Fiber optic, DSL, and satellite services from Verizon, AT&T, CenturyLink, Frontier, and others are not compatible with any cable modem). (A built-in wireless router is included in the Motorola MG7315, MG7540, MG7550, and MG7700.) In addition to working with Comcast's Xfinity and Xfinity X1, it's also compatible with a wide variety of other cable providers.

Get rid of up to $156 in annual cable modem leasing fees. (The shown savings are for Xfinity and may not apply to other cable providers. There is currently no cable modem that can be used with fiber optic, DSL, or satellite services from major providers like Verizon, AT&T, CenturyLink, Frontier, and others. The MB7621 doesn't have a phone jack. Having cable Internet access is necessary.
The MB7621 is designed for use with real cable Internet service at rates up to 650 Mbps. In the words of Wirecutter, this is "the best modem for most people.

With a Full-Band Capture Digital Tuner, you can rest assured that your Internet connection will be stable and quick. This cable modem's 1 Gigabit Ethernet port allows it to be linked to a home computer, high-definition television, game console, or other media-playing device over a wireless network. 

Superior interoperability with other Mesh networks and Whole Home WiFi systems like eero, Google WiFi, and Orbi. There is no wireless router or phone functionality on this cable modem.  Save as much as $168 annually on cable modem leasing fees by ditching that expense. (The discounts shown are for Comcast Xfinity and may not apply to other cable companies.) Approved for use with Comcast Gigabit services, Cox Gigablast, and Xfinity from Comcast and Xfinity from X1, Cox, and CableOne. problem with RCN compatibility. (Fiber optic, DSL, and satellite services from Verizon, AT&T, CenturyLink, Frontier, and others are not compatible with any cable modem).

eero, Google Wi-Fi, and Orbi are all Whole-Home Wi-Fi and Mesh routers that work with this system. Any Ethernet-enabled gadget, like a router, PC/Mac, HDTV, or game console, can be hooked up to a system with a 10/100/1000 Gigabit Ethernet port. This cable modem can't make or receive phone calls and doesn't have a wireless router. Anticipatory Network Protection - When using a Broadcom chipset, you won't have to worry as much about DoS attacks.