Are they made of the same material? No idea. All I do know is that one is silver, and one is black. As we know, dozens of strings made of the same material feel nothing alike. B5E has a unique "plush" feel to it that is unique to it. Silverstring just feels like what it is: a flagship product.
Scorpion is a tricky old boy in that it is more powerful, offers better spin and is more responsive. It's not very expensive, but I seriously can't explain what it feels like to anyone. I honestly think that's just because it's the string for me. That one that responds just how I want it to.