Ah yes, braid or steel one of the truly great debates in sport fishing. I have always been a steel man but that is about to change, at least for one of my high speed riggers. Right now it is at the Scotty factory being tuned up and having 175 lb braid installed. The pully was a bit chewed up from the steel and the use of 12 to 20 lb balls but they said they just need to sand them and clean them up and they should be fine for braid. So I will be running braid on one side and steel on the other and will form my own opinion on which I like best.
I already have some experience fishing braid on friends boats and it is nice but also has its problems. It is far more susceptible to cutting than steel but less subject to fatigue and strand breaking than steel so it can last longer if it does not get cut. For example my kicker is mounted on the far starboard outside but it has a prop guard so cables cannot get to the prop on that side. The main motor is left down and used as a rudder when the kicker is operating. Now I have over the years a couple of times due to inattention and a slight tendency to turn a little too sharply, super strong current blowing the lines sideways in a turn, running lighter balls at higher speed (having the cable going out rather than down for a bad angle) or a quick maneuver to avoid someone who has cut me off or is playing a fish and the fact that my riggers are not mounted near the transom but rather more towards midship, managed to run the steel cable over and hang on the stainless prop on the non running main motor. Yes I know, better more attentive fishermen are saying they have never done anything that stupid. The point is that with steel you raise the main motor take the boat hook and lift the cable over the prop. With braid if it gets anywhere near anything like a sharp prop it cuts off immediately and is gone. So it would seem to me that steel does not last as long in general as braid but is more idiot proof when it comes to cutting off. I would also suspect that if you were to ever foul a steel rigger cable with a braid cable, the steel wins.