How does Osma compare to Manantiales?

[Geordon]

I know hat my beloved Manantiales will not be replaced in-kind, but I'm wondering if anyone can compare Osma soap (with alum!) to the Manantiales, which is rich with mineral salts?

 

[njpaddy]

Never tried Osma, but I don't find a big difference between Manantiales and the La Toja stick. I figure the stick do when my Manantiales is gone.