You are correct, it's all about the taper. These lines could probably vary a full weight, if not two (and I bet they do in the manufacturing variance), and we would still have the same opinions of them due to their tapers. I just see so many guys writing about 146 grains vs 150 grains vs 140 grains, and they need to be writing about 5.5 foot front taper versus 12 foot front taper and notating those differences.I agree , a few little grains of weight are all but imperceptible. However, as I referred to, weight distribution is more apparent. If I take the same 9'/#5 and cast it with Gold, Tech Trout, Trout, Infinity and Cortland Omni-Verse, all close in weight as well as design concept, I not only feel the differences between them but often observe it visually in loop formation as their mass placement and the rods tip responsiveness impact one another. Sometimes it is not immediately obvious and takes time, sometimes it is crystal clear immediately. Taper taper taper. Sometimes it is splitting hairs...GS 8'4"/#4 like Trout better than Tech Trout, T LL 8 1/2'/#4 like Tech Trout better than Trout; in a vacuum either would be fine with either.