I'm currently doing NROLFW and it's the only one I've read so I don't really have enough information to answer your question. (For what it's worth, I love it. Love!) But, just to further complicate matters, I just wanted to mention that some material from the original NROL has changed and apparently significantly enough to justify releasing a new version called New Rules of Lifting Supercharged on December 27th. In light of that, I would suggest starting with NROLFW or NROLFL.
Mordor Challenge : 73 miles