Cervical or survival?
Just giving you are hard time.
The ESEE is a nice blade. I do not yet have the 6, but my experience with the others tells me it is a good blade.
I could tell you that I do not like the Tops because of the swedge and the pommel, but for every downside I can tell you about, someone else can probably point to another use where it is an upside. There is a lot of personal preference...I say get the one you are leaning towards and get really familiar with it. Once you develop the skills to use a particular knife, you will likely understand that it is a lot more about the skills than the fairly small differences between these knives.