I'm not a lady, but I do have an opinion on the two.
I agree that there are similarities in the overall structure, and when I smelled SM I felt it was sort of a simplified JdP. I like both, but I'd go for JdP, because it's more striking and vivid. A realistic buttered toast top, then immortelle in all its gourmand aspects. And I like immortelle a lot. If one goes for Lutens, one has to embrace the richness. SM is smoother, less over the top. Good too, and perhaps safer, but perhaps somewhat less fun.
So many other Lutens worth wearing. If you ask around, you're probably going to get the whole line - everybody has his or her own favorite. I'll toss off one: Arabie, bitter herbs, liquor, and fruits.