The answer to this question needs careful assessment of many things.
Each model has its own pros and cons and can be suitable for achieving the major objectives of private-private partnership to a varying degree. Special characteristics of some sectors and their technological development, legal and regulatory regimes, and public and political perception about the services in a sector can also be important factors in deciding the suitability of a particular model of PPP.
There is no single PPP model that can satisfy all conditions concerning a project's locational setting and its technical and financial features. The most suitable model should be selected taking into account the country's political, legal and socio-cultural circumstances, maturity of the country's PPP market and the financial and technical features of the projects and sectors concerned.
As an example, for a new project, a BOT type of model may be quite suitable in a matured PPP market while a PFI or BOO type of models may be more appropriate in a developing/untested market.