User blog comment:D. Cello/Assassinews 10/11 -- Desmond's Ancestry Revealed/@comment-4499860-20111012003917/@comment-4499860-20111012220946

Maybe it is a problem with the Animus. That would explain why they never lok alike in the cinematic trailers. Still, you have to put a good reason for this, you can't have two guys that look exactly the same (same scars and all) and just say they look alike because in the past every badass had the same face.