Tested these out by setting these paremeters to both of my 8125B NICs and I have to say this does work very well.
unraid (samsung 870 evo cache drive) to my PC speed was constant at 220MB/s (vs fluctuating 220-235 with r8125 driver) and never fell to Gigbait levels.
PC to unraid was identical for both drivers at 283MB/s
Did not notice much difference in CPU Load, it seemed to be about the same. Latency may be a little better under load with r8125. Now it's definitely worth keeping r8169 driver over the hassle of getting r8125.