Can only share my experience with both.
At home we have Verizon DSL and could not be happier with it. On the one occasion when we had a service interruption, we were able to get a very cordial and helpful HUMAN on the phone immediately who explained the problem and told us when we could expect service back. He was accurate.
At work I am stuck with Comcast Cable modem. It is horrible. We have internet out at least once every day. Also, we get these slow periods where internet is up, but crawling.
Today, I have no access to my Yahoo mail at work because of a Comcast problem, but have no such problem at home via Verizon.
Good luck!