Can you recommend an article about what is the difference between the simulation of a person vs. "really" reviving a person? ... I see this as a difficult philosophical problem and don't know how to relate to it.

Same here. My own attitude is that we do not currently have software for which the question of it being any more conscious than a rock arises, nor any route to making such software. Therefore I am not going to worry about it. While it may be interesting for philosophers, I relate to the problem by ignoring it, or engaging in it no further than as an idle recreation.