Confusing info from Xfinity - replace modem

I got the exact same thing and am confused.

Concerns moved here to the Customer Service help section for greater exposure to Comcast corporate employees (The Digital Care Team) for assistance.

Hey there, @user_hup0xg! Thank you so much for taking the time to reach out to us here on the Xfinity Forums! I completely understand where you are coming with wanting to ensure that your equipment works for your services you subscribe to. I would be more than happy to dive into the account fully, and provide any details on our end. Can you please send us a DM to get started?

Please send us a direct chat message with your full name and complete service address to “Xfinity Support”. To do so, click on the chat icon located at the top right of this forum's page.

Here are the detailed steps to direct message us:

1. Click "Sign In" if necessary. 
2. Click the "Direct Messaging" icon. 
3. Click the "Start new conversation" (pencil and paper) icon. 
4. In the "To:" line, type "Xfinity Support". 
5. As you type, a drop-down list will appear. Select "Xfinity Support" from that list. 
6. An "Xfinity Support" graphic will replace the "To:" line. 
7. Type your message in the text area near the bottom of the window. 
8. Press Enter to send it.

https://forums.xfinity.com/conversations/guidelines/how-to-direct-messaging-within-the-forum/697ba1e570934d009185c514