I had pretty nice ethernet setup prior to first trying two FMC, both with lps. Original setup was server out via 2nd ethernet port to SOTM SMS200Neo, usb out to Uptone usb regen (powered by lps) to dac. This with all AQ Vodka ethernet and AQ Diamond usb.
Next setup which bettered above was server ethernet out to the two FMC with lps to SOTM to Uptone usb regen to dac.
Best setup has been and continues to be, server ethernet out to single FMC to Sonore OpticalRendu (powered by Uptone JS-2 lps) to dac. Getting rid of one FMC, lps to power it, one ethernet cable and Uptone usb Regen not only simpler setup but also far lower noise floor and more relaxed presentation.
The two generic FMC should excel, only listening to the FMC in your setup can ultimately determine your preference. Minimal cost of this conversion makes it a no brainer IMO. OpticalRendu would be optimized optical setup, this would be fairer competitor to the EtherRegen.