What it comes to bottled water can you actually tell the difference in brands?

There are so many brands out there. I went and bought a case. I bought the cheapest or on sale. Is there a taste difference? Do you get better quality in water by buying the more expensive brand? What brand do you buy? I was thinking of buying a Britta (Is that how you spell it) pitcher or a filter for the tap to save money. Does that work?