There are obviously some variables, buffering or something out there since download speeds do not seem to be very consistent running the tools several times. I tested three times each with the two engines.
>From SATX, TWC/RR: Ookla Download Speed 24408 28494 22662 Kbps Upload Speed 483 492 493 Kbps Latency 18 18 18 ms Jitter 2 2 2 ms MLAB Download Speed 16854 17630 15780 Kbps Upload Speed 487 493 493 Kbps Latency 18 17 17 ms Jitter 2 1 1 ms Regards Jorge