Overall, I like 31 Rue Cambon much better than No. 22. The 22 is, in my opinion, too aldehyde-top-heavy and not that exciting. I have been seriously thinking about buying the 31, but have not done so yet because it does not have great longevity on my skin. It seems to be totally gone within 4-5 hours. I think Tania Sanchez found the same thing and that's why she says in The Guide that it should be sprayed on fabric to "slow the slide show". But 31 is truly awesome as a fragrance composition and I loved it from the first sniff.