I would like to know which is the real difference between the Recursive topos (in the sense of Mulry) and the Effective topos (in the sense of Hyland). Especially what is related to recursive functions. Do they have the same semantic power? I will be gratefull with some hints about texts related to this.
Thanks in advance.
PS: I don't give definitions because of their big extension, but I could give them if anybody wants.