Most of the time I use 6lb test for crappie fishing. I only cast and vertical jig. I cant tell much of a difference between the line as far as falling, but breaking strength I could tell a big difference. The biggest difference I noticed was when I fished with Stren clear blue 6lb compared to 4lb and then the hi-vis gold Stren. I caught several catfish between 15 and 20 pounds on the 6lb line, but anything bigger would break it. The 4lb would break on anything that looked to be bigger than 7lb. I cant swear to it, but I wanna say it was the 4lb hi-vis gold I was using while fishing the Tennessee river when I caught several big buffalo while crappie fishing the turbulant back water pump out. The biggest one was 60lb and I got it in, I caught several big ones on that line, but did have some to break it. Never the less wether it was the 6 or the 4, it sold me on the strength of that line. It was alot stronger than the regular stren and I think was the same diameter or smaller or real close. Stren extrastrength 6lb line is hard to beat for mono. You can tow your boat with that stuff lol