I have a pair of walnut shell Dalton boots that I bought from bkotsko here on SF, which were a nice shade of brown (darker than I expected, but I prefer them over my calf Daltons that i'm selling), I'll have to take a side by side photo once the brown shell Strands come in. So, I guess it worked out where the different shades give me more variety in my shell collection.
The Strand is by far my favorite AE shoe though, and they look extremely nice in walnut shell so great find by you and your SA!
Mine as well. I have three pairs of Strand - brown and walnut shell, and bourbon calf.
I was initially worried that the two shells would be similar enough to be redundant, and for some it probably would be, but in person the brown is a lot darker than even my seemingly dark walnut pair. I have seen photos of walnut shell that look a lot lighter than mine, but have also read of AE's trouble with consistency with the color so I just chalk mine up to being on the darker side of walnut.
What cracks me up is how similar the bourbon and walnut look in photos, especially in a well-lit room with bounced flash, but in reality they look completely different due to the (obvious) leather difference.
I am very jealous of your walnut shell Daltons. I love the boot and finding a pair to match my Strands would be a real coup.