Having used both, I have a preference to the peanut.
Both are great knives, will do most anything a small pocket knife will do.
Both are eye pleasing artifacts with style and grace.
But...
My heavy bias for the peanut is not when it's open, but because of the small package when it's closed. Both have almost the same length cutting edge, but closed the peanut makes a more forgetable package in the pocket. I tend to carry a lot of stuff in my pockets. Habit from bringing up three children and now having three grandchilden. While cutting edge is close on the two knives, the peanut is simply a smaller knife when closed. And it's an unfortunate fact as much as we'd like to fondle and admire our pocket knives, they are carried in the pocket 99% of the time unneeded until that 1% of the time we have to cut something. Carried much, used little. YMMV.
In the last 6 months since Jamie gifted me the damascus peanut, and I've committed to it being 'my' knife, I have not found it lacking. I like the fact that it disappears in a pocket until needed. It's smaller and lighter than the SB, but can do the same job if careful. I like that.
Carl.