XB6 vs XB8 for new service, should I ask to upgrade?

I recently signed up for the latest 200 mbps for 2 years deal with a free modem included for 2 years as well. Instead of the nice new XB8 that I expected from the commercials, I received the older XB6.

I know my speed does not really require the XB8, a was looking forward to trying out 6E. My biggest concern is that the XB6 has the Intel Puma chip and a while ago I downgraded from the SB6190 to the SB6183 to help with latency issues with the Inlel Puma.

Should I try exchanging mine for an XB8 or should I just try using it as is? I assume I can always switch the the 6183, it still would take a little time.