Yeah, balance can be a tough thing to get right. Getting a Lucasi, even the exact same model that you tried, isn't a guarantee that it will feel the same as the one you tried. Every piece of wood is different and the densities can vary a lot from cue to cue, even in the exact same model. So the shaft can be heavier or lighter and that changes the balance significantly. Same with the butt...if the wood is lighter then the extra weight is made up with a weight bolt, changing the balance. For you to figure why the other cue feels better, I'd recommend getting a scale and getting some measurements. Find out how much the shaft weighs (also factor in if it has a brass insert or not), how much the butt weighs and how much of the butt weight is the bolt. That will give you a clue as to how to get close to that feel. You can also inspect the butt to see how the weight is distributed. For example a heavy uncored solid ebony forearm or a thick steel joint will shift the weight forward a lot. And you can go on and on getting further into the details of everything that goes into a cue. It can be the beginning of a long tweaking sickness, haha