They were married to the same woman though.
I would imagine they are the same man & the details of the couple perhaps come from a marriage record?
James Stephenson appears twice because two different Stephenson families from different areas have claimed the couple as parents for their ancestor(s).
I suppose the question is, what is reliably sourced and what is unsupported? Do you leave one of the James’ with Elizabeth and their sourced children, and disconnect the second James and the unsupported children. Or do you merge and disconnect the wrong children from the remaining couple?
As an aside, the wife of the two James Stephensons is herself pretty suspect.She appears on WikiTree to be the product of a brother/sister relationship (I doubt this is the real situation, but her father, Robert Simpson, is purportedly the son of a Michael Sampson; unfortunately the source added to Michael Sampson shows that Elizabeth Simpson’s alleged mother, Lettice Forward, is actually a daughter of the same Michael Sampson & Forward is her married name.)