The activity of something is essentially information (consider how computer programs are ultimately just the activity of the components of a computer). If I copy information from one substrate to another, and do so with no changes, I don't have any new information. Applying that back to brains, assuming that consciousness really is only brain activity (which seems highly likely, but since we don't really understand the nature of consciousness, isn't completely proven), then I'd disagree with the new brain= new activity step