I found out that one manufacturer - Liberty Hardware - makes grab bars with a number of brand names. Their brand names include Franklin Brass, Safety First, Delta, Centurion, and others. I talked for a while with their Customer Service and concluded that virtually all of the brands come off the same production line and are essentially identical (except for advertised feature differences).
We chose to buy the Safety First bars because Amazon had them for 1/2 the price of the other lines and, of course, the knowledge that I passed on above. We'll be receiving them in about three days. When I get them and then when I have them installed I'll let y'all know what I think of the product.
We found that the product at Home Depot isn't necessarily what they are showing with their demo board. There have been changes in the Glacier Bay product that we didn't care for. Make sure you compare what's in the boxes with what's displayed for you to touch.