Slow Ethernet but Fast Wifi on same computer

I have the black T-Mobile Home Internet device that I just recently purchased. 
 

My computer, phone, and other wireless devices have 200mbps speeds while my Ethernet connected devices have 60mbps speeds. 
 

I tested my computers speed wirelessly and it hit the 200mbps mark, I plug in an Ethernet cord and it drops to 60mbps on the same computer.

My drivers are up to date, I have tried 6 different Ethernet cables and 3 different devices, I have called 3 T-mobile technicians and still no solution to this problem. 

How can my Ethernet speeds match my wifi speeds?