At FamilyTreeDNA, the Y chromosome can be tested on 12 to 111 markers. This new cousin tested at the 25 marker level. When compared to my close Duryea cousin, only one marker out of 25 is different. When compared to the first Y-DNA cousin, the match is 25 out of 25. The variation on one marker possibly arose in my line.
This new cousin traces his Duryea line back to the immigrant Joost Duryea, as do the first Y-DNA cousin and I. But we do not have to go back to Joost in the 1600s for the most recent common ancestor. This newest cousin is related more closely. He is my sixth cousin. He is a fourth cousin, twice removed of the person who donated the DNA for my Duryea line. He is descended from Joshua Duryea, a brother of Garrett Duryea (1777-1834), the former stray and link of my family to the larger Duryea family.