I once tried a Brooks Swift saddle, which I think is sold as the lightweight version. I was so shocked at the weight, the crudeness of manufacture and the discomfort that I sold it straight on. I expect that if I had persisted with it, it would have stretched and sagged to fit my sit bones but it looked as if it was beaten together by a blacksmith in the same factory that used to make medieval chastity belts.
I think "Leather saddles are the best" is another cycling myth that ought to be consigned to Room 101 along with "Superglue can seal cuts in tyres".