A better test than comparing two Speedtest results (because it varies so much and involves equipment outside of your control) would be to grab 2 laptops and run iperf.

https://iperf.fr/

It's a little geeky to get set up, but basically you set up a computer on one end and start iperf as a Server. Then set up the 2nd computer on the other end and run it as a client. It gives you the actual bandwidth that you are getting between the two computers.