Yes, I tend to agree. Even if this child is Caucasian mix, imho, there is something about this child that does not strike me as being of Korean descent. Cannot put my finger on what that is.
That aside, Trenton's great grandparents found a copy of the magazine that had this picture and they seem to think this little boy is him. They also showed the picture to a couple of individuals who figured largely in Trenton's young life, who also seem to think this little boy is him. In light of the fact that they (and the other two individuals) spent extensive "real life" time with Trenton, I am inclined to suspend doubt. Simply bc a child can look very different from picture to picture.
I just hope that LPD follows up on this, and since his both his grandparents and great grandparents are so sure it is him, at the very least, does a DNA test (the only way to conclusively rule this child in/out).