I just ordered my first Strider, a GS. It had a real strong, sharp tip on it, and seems to be an excellent sticker. It's also very streamlined and compact, with a long cutting edge.
I plan to eventually buy a Busse as well. However, it seems like the Busses are better choppers, and the Striders are better stickers. I think the Striders are also a little more compact. It's just my opinion. In a life or death situation, I'd rather be sticking my opponent instead of chopping or slicing. The Busse may be a better blade for taking out in the woods and using it to build a shelter, however.
As far as durability goes, they are both super durable and they both have lifetime guarantees. Also, the folks I've talked to on behalf of both companies are all real cool. There's no doubt about it, these two companies are on top right now. I don't think you'd go wrong with either one; it's just a matter of holding the blades and seeing which one fits you best.