What Kind of Water Do I Drink At Work?

I went to fill up my water bottle at the office water cooler today and saw this:

My office now has Poland Spring water. Since I started working at my office in March, the water cooler has exclusively had Deer Park water. I am not sure if the water tastes different. Both bottled water brands are owned by Nestle.

Remarks: I saw this documentary last week called Tapped. It was about how bottled water companies, like Nestle, steal water from public sources and sell it back to the general public at 100 times the cost. In the process these companies ruin the environment, etc. Interesting stuff.