Originally Posted by LiveJazz
I like Eau Sauvage best, with the Chanel a close second. But I don't consider them to be very similar in the first place, except that they are both technically cyphres. You could easily own both with no overlap.
Eau de Guerlain smells fabulous, but the longevity is terrible. So if longevity isn't a factor here, that might be the top choice. And if you're looking into Guerlain Eaus, you must check out Eau du Coq.
Anyway, you would do well picking any of these.
I actually get better longevity from Eau de Guerlain then any of the other Guerlain Eaux, but perhaps that's because I have vintage bottles and not the new stuff.
Interesting set of three fragrances to compare. While all have citrus topnotes they're in slightly different genres. Eau de Guerlain is a traditional citrus/floral, CPM is a chypre, and Eau Sauvage is somewhere in between, neither a full chypre nor a citrus/floral, but also both. These are three excellent perfumes so you can't go wrong with any of them - but owning one does not preclude owning the others (I own all three). Personally I prefer Eau de Guerlain of the three.