I am afraid I am not, but I strongly feel there is a difference....even if Mulberry says it's the same, maybe these pics can help? I feel that Darwin has more life, richer colour, if that makes sense to you?
Let's see if you can pick the Darwin from these pics;
there are two of each...not an easy task, but I found a Darwin gem amongst NVT bags the other day, and it was no problem to pick him from the other 6 bags on the shelf.