These profiles represent two different people and shouldn’t be merged.
Both Williams are married concurrently to two different people and procreating in two different places. (And they both have a child baptised in 1677, in different countries. See Colonial William’s son, William, on Wikitree, and Yorkshire William’s daughter, Jane https://www.familysearch.org/ark:/61903/1:1:6829-2DGY?cid=fs_copy
(Also mentioned here https://landedfamilies.blogspot.com/2022/07/519-beaumont-of-bretton-hall-and-bywell.html?m=1 )
The William who stayed in England can be found in various sources as the child of the attached parents. The older William, who married & had children in Virginia, is not found in any sources related to the parents and probably should be detached. The Darton family is pretty well documented.
Without sources to show where any of the info came from, it appears to be a typical piggy-backing of a person of unknown origin onto a known family on the basis of a name.
To merge would be a mistake.