I have only handled an sng and do not own one. I guess you can tell by my avatar which knife I prefer. There are not many people out there that can make a quality product (high level of fit and finish). When I buy something expensive, it is usually because of the quality of the product that I choose to pay the premium over something lesser. To me, that is the bulk of the "worth" in a high end product. So, that is why I prefer the sebenza.
Strider obviously does not put quality at the forefront of its priorities. There is nothing wrong with that. However, I feel that it is not hard to make an overbuilt knife. Its a matter of design rather than anything else.
I think its also important to see why you are paying such a high price for these knives. For the Strider, you are paying a premium for the warranty and the fact that it is overbuilt? Compare this to the reasons why the sebenza is priced high, attention to detail, hand finishing, tight tolerances, lots of scrap parts to make one perfect knife.
Again, some people don't give a rats ass about quality and love things that can take abuse and still keep working so if you are one of those people then get the strider!