I don't have Silver Dawn. I just swatched both ATG and SW onto my hand and then a tissue. I'd say that SH is a little darker, a bit more rose/champagne gold. The finish and great pigmentation is really what makes it so different. I personally find SW to be too metallic/bold for me to wear to the office (but I work in a conservative environment so that might not be an issue for you). I wear it most often as a sheer wash of colour in the summer. It's a nice one and done look for me. ATG is a more wearable, office friendly finish for me. SW is very similar to Superb, if you have that. I'm reaching here, but I'd say SH is very slightly more rose gold than Superb, but that's with a heavy swatch.