When it came time for Joseph to reveal himself to his brothers while they were in Egypt it was not any physical strength that enabled him to do so, but instead God was able to give Joseph the inner strength to let his brothers know who he really was. Odysseus also had to reveal himself to a family member, his son Telemakhos. He was given his ability to show himself with a transformation of his physical body. He first met up with his son after about nineteen years in the form of an old beggar. This made it so that Odysseus could wait until the time was right to show himself to his son.
Both Odysseus and Joseph had to show themselves to their family members after many years, but there was one big difference in the situations. Joseph had to show himself to his brothers whom he had seen before in his adult years, and they had seen him. So when it came time for him to show himself it was not as hard for the brothers to believe. They had an idea of what he looked like. Joseph had taken on more of an Egyptian look to himself with the tanned skin, and clothing, but the facial features that made him who he was had not changed. Odysseus had to show himself to his son who he had left as a baby to go to the war. Telemakhos had never seen his father at an age where he would be able to recognize him again. This meant that Telemakhos only had faith to rely on to believe that it really was his father that was in