The Sterling Roberts b. abt 1791 in SC is in the 1860 GA Hall County District 565. At least on Ancestry someone has corrected/added Sterling as the first name of the S. Roberts as written. Since he is age 69 in 1860 I doubt he served in the war. The Sterling Roberts of Baldwin County GA mention in a previous reply to your previous query is Sterling W. Roberts b. abt 1844 in 1860 Milledgeville, Baldwin Co GA census. There is also a Sterling G Roberts b. abt 1847 in Dalton, Whitfield Co, GA 1860 census.
Ancestry has a Sterling T Roberts b. 1819 S.C. applied for an Indigent soldier pension 1894. Confederate.
There s a Starling G Roberts listed in a "Georgia, Civil War Muster Roll 1860-1864". No unit or county just noted "married".
Taking a quick look at 1850 census the 1790 b. Sterling Roberts is on the same page as a Sterling M Roberts b. 1820 both District 38 Hall County GA. Someone added the name Mercer as middle name. All the census information is from Ancestry.com. These same corrections or additions will not be on FamilySearch.org. indexes.