At this point don't believe the website! I also did a side by side and it said I would save because it changed my current $40 access line fee to $20, that is not accurate. I am finishing my 2 year contract and until I do, even if I switched, my access line fee would be $40.
It looks like your current plan is this:
$40 - 2 GB
$40 - Line access fee
What is the $15 discount for? Month to month?