Well the Tom Brown Tracker needs to be re-profiled before it'll work well, and even then it's a big compromise. It has that straight edge section but it would be nice to be able to use your whole blade for knifework instead of just the one section (which is probably why combo edges aren't well liked). The other part is like an axe except it has no long handle to help you swing it which means it's not very effective. I'd imagine it would be like using an axe as your knife all the time.
So as an axe it's not very good and as a knife it's not very good, this leads me to the conclusion that this would be a bad choice for a survival knife. I guess the only thing it does that could be considered good for a survival knife is be a compromise, ya I just said that was bad but if you only have one knife in a survival situation, it would be great if it could do everything, even if it didn't do everything perfectly. The thing is, there are other knives that work better than the Tracker for that kind of all purpose role and you'd probably be better off with one of those.
The Ka-bar on the other hand is actually a knife. When you first get it, it may need to have the edge thinned a little to make it cut better (or so I hear). Now it won't cut as well as a scandi, there's no denying that but it will cut. There's always a compromise, if you use a scandi, the edge is thin and more easily damaged but it cuts very well. A sabre ground Ka-bar won't cut as well as a scandi but will have a tougher edge.
So I guess I'd suggest doing what Hoodoo said, make a list of what you'll use that knife for and then decide what you need. Will you need to use this knife for hacking down small trees and splitting wood (tracker, BK9, ESEE junglas, an axe)? Will you need it for finer cutting tasks that require a very sharp edge (puukko, Mora)? Or maybe something that can be used to split reasonably sized wood but still be small and effective enough to use for finer tasks (Ka-bar, ESEE RC-4/6, BK2/7). Only you can decide which knife is best.