Specify 2 test servers

[BigManDave]

Hi, not sure how feasible it would be and it's probably quite niche but I'd like to speedtest 2 servers equally.
My use case is that I'd like to easily compare the results from my ISP's Speedtest server and an external Speedtest server as the results are often dramatically different.
Thanks in advance.

[Judman]

To add to this, an option to test a rotation of servers would be great. There is already a server list in the docs. Using this would be great to test a variety of servers. Just testing the closest geographical servers does not give a really good picture of performance.