The white paper is not really a term that a lot of people are familiar with. If this is the first time that you have heard about it, you should know that this is something that will give the potential benefits of a project that is being proposed. The case study will go beyond that.
It will provide details on how the possible solutions that are available can be effective in fixing the issues that are available. A white paper can be considered to be simpler and it will not have as many details especially when compared to a case study. A case study is supposed to be very thorough.