In The Empire Strikes Back, Luke receives a very realistic looking hand that can even feel pain.
Compare this to the hand Anakin has at the end of "The Clone Wars" which is obviously robotic, and does not even have a covering that resembles skin.
Technology advancing in the 20+ year period between amputations does not make sense. Its doubtful that prosthetic technology not be able to produce a hand of Lukes quality in a time when cloning technology was available.
Luke's hand is provided to him by the Rebellion, which had limited financial and medical resources. Compare this to Anakin, who as a Jedi in the time of the Old Republic, had access to limitless medical resources. The Jedi probably could have arranged for a biological hand to be cloned for him, but that might raise ethical concerns.
It seems Anakin should have received a hand as advanced as Luke's