I haven't used the SG but have something similar made by tough possum, same dimensions basically. I have a Sherman also that I think is one of my favorite admin/organizing pouch, but doesn't expand well for use to shove a puffy in or something. I like the center zip for access if something is on the bottom and they expand a little better naturally based off design. Sherman lends itself to more organization. Also the Hill people gear tara pocket would be a consideration, though it is larger in size it is very capable and compresses well.