This really depends on your setup and your house. Usually a wired connection is better than a wireless connection (CAT5 ethernet, MOCA, Powerline, etc). Now out of all the wired solutions powerline is the least stable as it has to deal with lots of interference on the power wires. Wireless is also unstable as it also has interference problems, especially in the 2.4Ghz band. If those are your only 2 options I would try purchasing a powerline adapter from a place where you could return it if it did not work. Get an AV2 powerline adapter set. It has the best chance or working. If it does not work then you will have to go with wireless.