Well, it could be my imagination and faulty memory. Right now I am constantly struggling with the sheer size of SOB, whereas I was going through the same pains with Family Life a year ago, so that pain has subsided!
SOB has a lot more girls to interact with, but fewer interactions per girl (fewer, shorter, threads). But many of the events in SOB are replayable, with more different versions. Both have about the same download size, but with FL most of the file size was due to a few long video clips, while SOB has more, shorter ones. And the number of lines of Renpy code is doubled in SOB. I'm currently finding so much in SOB that I had no idea existed.