blackhawk8259

Ok i have a few questions for who ever knows enough about rb swaps vs sr swap.

Ok heres the deal. I am going to do a swap into my 1991 nissan 240sx for a grad project at my high school. I want to know what is better and not just what you like best please back it up why. heres some guestion.
1. Sr or Rb?
2. Which is cheaper to install?
3. Which is easier to installl?
4. How much to install either?
5. Cost of parts?
6. which i could make the most hp for a low budget?

Thanks so much cuz i really need to get started on this project. It means alot.