I had this arguement before a long time ago, so to clairfy my meaning is, and I get this from the sequel books not the movie, the replicants are made from "templants", human beings who are used as the base for the replicant model, and sometimes the replicants don't perfectly match thier templants.
Other folks felt it was an effort to make him look younger, and sure, could be that way.
However, since the photo is from an ID that is now in question, you gotta wonder what the actual screen used ID looked like. :unsure