I have DSL with Cavalier, my daughter has Comcast...we are under the same roof..

Most of the time Comcast cable seems faster[by the numbers anyway], but not always, it seems to change with a busy load on cable..
My DSL is pretty consistent...Speed difference is hardly noticeable..

Forgot to mention, Her cable internet was down 5 out of the last 30 days....I find her on my computer more times than not..

I was a Comcast customer but made the change to DSL....I won't go back to cable...DSL works in this house..