I would recommend more research.
There was a John Williams s. Parke and Priscilla, b. June 6, 1706, in Roxbury Massachusetts<ref> Roxbury.Massachusetts: Vital Records, 1621-1850 (Online Database: AmericanAncestors.org, New England Historic Genealogical Society, 2001-2016). https://www.americanancestors.org/DB190/i/7787/380/141321351</ref>
There is no record of a John b. 08 DEC 1714 in Lebanon, or any where else in Connecticut
Considering the gravestone of John d. 1774 says he was age 68 (b. 1706). Yes they look like duplicates.
Add the birth source I mentioned above to both profiles. Then propose the merge, in the comments mention that the birth date on -16758 is incorrect to see the bio. Correct birth is June 6, 1706, in Roxbury Massachusetts