1. Taking a shot in the dark - Maybe check your ethernet cables? Not all ethernet cables are the same. If it's a cheap / old ethernet cable then it might not be

1. Taking a shot in the dark - Maybe check your ethernet cables? Not all ethernet cables are the same. If it's a cheap / old ethernet cable then it might not be rated for the same kinds of speed as your wifi. There is a chart on this page labeled "Ethernet Cable Performance Summary" with some stats for different ethernet cables. https://www.electronics-notes.com/articles/connectivity/ethernet-ieee-802-3/cables-types-pinout-cat-5-5e-6.php https://www.electronics-notes.com/articles/connectivity/ethe... 2. Yes, although in my experience this is very minor. On my network - good wifi has a 3ms latency and good ethernet has a .3ms latency. While that is a 10x improvement, in the scheme of things I don't notice 3ms of latency. I live in a high rise condo with lots of interference in a major city and can't say it's caused me any issues.