never tried the SD3G but I have a SSAE and like it. not sure if thats helpful though lol.. I looked at the SD3G and talk to a couple people about it but it was suggest that I would probably enjoy the SSAE more due to my rifle being set up as a "do all" rifle. Now that the 6.5 Grendel is built I want to refocus on the 5.56 becoming a 3 gun setup. From what I was told, the SSAE had a more positive reset and break.