Re: Ethernet slower than WiFi

I mmade no changes and work with comcast was in my building. Since then ethernet is slower than WIFI to connect.Should I change my plan from 600 MBPS to 1000 MBPS at what cost -I have bulk. 

Is the new Comcast cable upgrade in the building a regrssion or what could cause such a long ethernet delay?
I am assking but not getting an answer + would like to know what the reason for the lag is..