[ONT] Coaxial or Ethernet for latency.

I heard that Ethernet has lower latency than Ethernet for verizon fios. Which one is better for a 25mbps line and are there any downsides of using one over the other or is one better overall, is it easy to set up the Ethernet connection yourself? I want to use it for lower latency but only if it's a decent jump and it has no impact on on anything else. Also will it have any difference if i'm using a wired connection instead of wireless?