Gigabit Pro is symmetrical, normal Gigabit is not. Gigabit Pro is FTTH (whereas all of Comcast's other plans go over copper/DOCSIS3), and is symmetrical 2Gbps. For $300 per month with a mandatory $2k install, I might add.

You have to call them to get a quote, but here's a good blog post with the important info: https://binaryimpulse.com/2019/11/comcast-gigabit-pro-instal...