I have both ESSE and TOPS. Quality is the same steel is the same, handle material is the same, features are different. It depends on what you prefer in a blade style, handle style and grind. I like the TOPS better. Blade length is the same, but the handles on the ESSE knives are a bit slab sided and short while the TOPS knife is more rounded and feels better in my hand.
This is the TOPS I have
https://www.amazon.com/Tops-Knives-...948855&sr=8-7&keywords=bob+knifeFor a little less I actually like this better than the ESSE
https://www.amazon.com/Ontario-Knif...;sr=8-1&keywords=ontario+tak+1+knifeThe blade is almost identical to the ESSE 4, but with longer more comfortable handle. The RAT 5 is very similar, but with a slightly shorter, but much thicker blade. Too thick in my opinion.