Hi. I've found that the Venice sourcebook that can be downloaded as reward on BackerKit and the one on DrivethruRPG are different. The BackerKit one weights around 70 MiB meanwhile the DrivethruRPG one which weights around 100 MiB, and is 2 pages longer. The content of those pages isn't very important (an inner title and a licenses and trademarks page) but, to me, it looks like that the DrivethruRPG version has better quality because of the extra weight.