Compare those results alongside these for the LMR-400 cable.
It’s not totally accurate, but it gives a good idea of the loss of signal.
As you can see it greatly improves the signal to the Helium Miner. RG-58 had a loss of 1.314 vs a loss of only 0.375 using LMR-400. That’s nearly 4x less, which is good. There are many other factors of course, but for a no fuss measurement this will do.