Not sure what you're looking for, maybe frodo is on the right track.
Do yo want to know the IPC/UPC differences, high rise info or a combination of all?
In high rises, most codes are pretty generic and similar. It's the details in more concentrated areas that you will find a conflict between IPC or UPC, in my experiences.
My area still follows some of the older codes that all others were based on (older than the 1928 UPC) integrated with newer codes. Do you have a particular situation or looking to update your education?
Opinions flow freely around here if you ask the right question.