Per chatgpt, here are some differences about his PL. I haven't verified all this, but the part about being controlled by his foundation instead of NARA is interesting.

The Barack Obama Presidential Center, which is planned to include a library, is unique in several ways. For example, it will be the first presidential library to be built in an urban area, as it will be located in Chicago's Jackson Park. Additionally, the center will not include a traditional presidential library, as the documents and artifacts from Obama's presidency will be digitized and stored at the National Archives and Records Administration. Instead, the center will focus on community engagement and will include a museum, classrooms, and spaces for public events.

The Barack Obama Presidential Center will also have a number of features and initiatives that are different from those of past presidential libraries. For example, the center will have a "Public Leadership Institute" that will offer training and leadership development programs for young leaders from around the world. Additionally, the center will include a "My Brother's Keeper" program, which was established during Obama's presidency to support young men and boys of color. The center will also have a "Global Girls Alliance" program to empower girls around the world through education. Another difference is that, the center will be operated by the Obama Foundation, a separate non-profit organization rather than the National Archives and Records Administration.

The Barack Obama Presidential Center will be controlled by the Obama Foundation, a separate non-profit organization, rather than the National Archives and Records Administration (NARA), which is the federal agency responsible for the operation of presidential libraries. This means that the Obama Foundation, rather than NARA, will be responsible for the operation, maintenance and development of the center. This is different from past presidential libraries, which are typically controlled by NARA, which is responsible for preserving and providing access to the records and artifacts of a president's time in office, as well as for the operation of the library and museum.

Another difference is that traditional presidential libraries have been built with federal funds and are maintained by the National Archives, while the Obama Presidential Center is being built with private funds. However, even though the center will not be operated by the National Archives, it will comply with the Presidential Records Act and will be subject to the same regulations and requirements as past presidential libraries.

https://www.obamalibrary.gov/about-us