MoCA uses what is already in the wall
MoCA can be excellent when coax already connects the router area to a TV room, office, or mesh node location.
Ethernet gives cleaner control
A direct Ethernet run avoids coax splitters, provider equipment conflicts, and point-of-entry filter planning.
Map before buying adapters
Find every splitter, amplifier, wall plate, and modem connection before assuming the coax path is continuous.
Use the wired path where it changes the most
Wire the mesh node, office, NAS, or media room that suffers most from wireless backhaul or unstable Wi-Fi.