Assumption fail....
first, people choose lots of things.... tops is not a bad manufacturer but it's certainly not generally preferred over Ka-Bar... (around here at least)
Esee is only a MARGINAL improvement over Kabar, in that esee usually comes with better sheaths, and ofter has better handle material
also, with Ka-bar, you need to make a distinction, since Ka-Bar owns Becker, which is generally agreed upon as the best budget hard use knife company out there (budget being key here)
Esee, Ka-bar, Becker.... these names will come up together often.... Topps, much less so. It's a different market, and not one i get into...
If you are buying a knife and you want to know what you would be advised to buy, tell us what you're going to do with it
Also, note, becker (and kabar) are famous for their awesomely heat treated 1095 crovan steel... it takes a serious beating and keeps on cutting