Bownutty,

Ultracam is a blend of Dyneema and Vectran. I don't make strings out of two different types of string, and I doubt that it is recommended.

I like it for hunting, because it's very stable. It is not affected easily by heat. Many strings will creep, just from sitting in a hot truck. Ultracam will resist this very well. I don't know if one type is more reliable in the field (under abuse). I would guess that they are all similar.

I've never had a Berry string, but I've heard nothing but good about them. They look very nice in the photos Ive seen. I don't think you could go wrong with one.