When you're talking about patch cables in the back of a rack, there will be zero difference between any one basically-decent cable and another. For one thing, the lengths are so short that the difference in their total capacitance is minimal. For another, the outputs of everything in the rack are from active devices, with very low impedance, so the capacitance is pretty much irrelevant anyway.
There are no other tonal effects from any cable. "Don't believe the hype."
Now, if you had a patch cord that had bad shielding, and was noisy, then by all means replace that with a lower-noise cord. Same goes for flimsy assembly, bad solder joints, wire that's so thin it's liable to break up inside the vinyl coating... they can all make a cable perform badly, so replace with a well-made cable. Any of Lava's cables will be well made.