Have no fear.... Woody is here
Congrats on one of the greatest scores you will ever make when it comes to knives!
Its no secret, the choppy is my favorite, and most used knife. Its not the best chopper i have ever used, its not the best slicer i have ever used... BUT it is the best do it all knife that i ever put in my hands. It slices, dices, chops, and batons with pleasure. Most knives do one thing well, but the chopweiler is one of the real JACK of ALL trade knives. Not too big or to small. And with its handle..... Its easily the most comfortable handled knife i own or have held. Everyone i have let try it out has commented on how comfortable the grip is.
I have used all 3 of the knives mentioned in the OP to chop. Plus 1 or 2 more LOL... So i will discuss the chopping capabilities from my experience plus give you some pics and stuff to hold you over.
Now my Chopweiler has been reprofiled and the edge has been thinned a bit, this did indeed make it perform quite a bit better, but even before the edge work this knife was a champion. I will try and give my opinions from before the edge work was done. For an example, before the edge work was done it didnt bite quite as deep as an RTAK2 (which is very similar to the junglas), but after the edge work it bit deeper with the same amount of force applied. Granted... The edge work on my chopweiler was done by one of, if not the very best cutter in the world, Dan Keffeler, The guy knows a thing or 2 about edge geometry and making a knife perform its best. So comparing my chopweiler with different geometry to a stock chopweiler is not really fair, they wont perform the same.
That being said, When it comes to chopping the chopweiler performs like a bigger knife for sure, the 1/4" stock gives the knife more forward weight and momentum which helps it bite deep and chop better than a 3/16" knife of the same length. But comparing it to a 9"+ bladed chopper isnt a fair fight.... Yet the choppy doesnt give a damn about "Fair" It holds its own even against the BIG boys. Will it out-chop a junglas stock? NO. But will it be easier to wield, more comfortable to hold, easier on the belt, better on the small task, hold its edge longer, and look better doing it all?? YES.
I know your asking about chopping but lets talk batoning for a quick second as well. The choppy is a batoning king. The top curve of the drop point blade sticks up enough to really give you a good area to hit with a baton, the shape of the blade is perfect for batoning. My wife has asked to use the chopweiler to split some logs while camping just for fun, she said it splits them so easy its fun!!
If using a knife is uncomfortable, or if its just too big and heavy, you will get tired using it and eventually you will not want to carry it no matter how awesome it is. The chopweiler shines in this department. Its not too big or too heavy, yet can handle anything thrown its way in the woods.
Lots more pictures, a couple videos, and more info about my experience and opinions on the chopweiler.
http://www.bladeforums.com/forums/showthread.php/1215738-A-little-fun-with-a-Busse-Hell-Razor-and-Chopweiler!
http://www.bladeforums.com/forums/showthread.php/1212474-Chopweiler-Pics-From-new-to-now-PIC-HEAVY!!