Here's a quick comparison of the Weber 80728 stainless grate and the Grill Care 17436 stainless grate.
I purchased the Weber grate directly from Weber in January 2014 for $50.80 + $7.00 s&h. The Grill Care grate was purchased from Amazon in March 2015 for $29.99 with free 2 day Prime shipping.
I don't have a pic, but the Weber grate was shipped in a box made specifically for a grate. Amazon shipped the grate in a 22.5" x 13.5" x 36" box!!!
Here they are side by side.
Weber left, Grill Care right.
Grill Care states they are thicker than the Weber grates. They must be comparing them to the standard grates because the Weber stainless grates are thicker. I do not have any clean standard grates to compare them to.
Weber
Grill Care