New XB7 is significantly slower than XB6 being replaced

I received the XB7 today in the mail. Before disconnecting my XB6, I ran some speed tests. The speeds were between 183 mbps and 391 mbps. I pay for Gigabit service, by the way, so I was hoping for an improvement.

I connected the XB7 and ran numerous speed tests. It never clocked faster than 110 mbps.

I reinstalled the XB6 and again achieved speeds of 177 mbps to 384 mbps.