I have had both Spectrum and Xfinity. I had Spectrum the first year but I found that it wasn't that great. I had problems connecting to my phone on the house wifi. This happened several times a week. I also had problem with my Google Assistant connecting to the wi-fi. Because of these problems, about a year ago, I decided to switch to Xfinity. The wifi is stronger and faster and the current price is significantly lower than what I was paying with Spectrum.
However, my biggest problem with Spectrum is their cancelation policy. If you cancel in the middle of your billing cycle, they do not pro-rate the bill.
Instead, you are required to pay for the entire month. There have been class actions and some states (not including Florida) have passed laws making this illegal. If you are going to cancel, make sure you cancel in the last week of your billing cycle. If you are a day late, you pay for the entire month!
Spectrum claimed that the no-refund policy was for the consumer's benefit because it made the bills "easier for subscribers to understand."
Maine requires cable companies to pro-rate final bills.
Office of the Maine AG: News & Reports