Difference between freezer bag and storage bag
Freezer bags are slightly thicker plastic, and more forgiving of sharp or pointy foods (like meat with protruding bones).

I know some freezer bags include a white place to write a label on, I don't remember if storage bags do as well.

The press-to-seal bags do a better job of not spilling if accidentally dropped compared to the zipper versions.

http://web.archive.org/web/20130105063349/http://www.consumerreports.org/cro/magazine-archive/2010/march/home-garden/storage-bags/overview/index.htm