Allocation vs PSA well in Permian

Hello! Can you tell me the main differences in PSA vs Allocation wells in the Permian and how a company decides? Pros / cons? An example on interest calculations using the Plat for a multi section well would also be helpful. What are the most helpful sites you use to get well information / acreage information for Permian? I know the RRC, but direct links within the site are appreciated as I’ve found it hard to navigate.